Fixed typo (#6942)

CHANGELOG.md

@@ -372,7 +372,7 @@ It allows to set commit mode: after every batch of messages is handled, or after
 * Renamed functions `leastSqr` to `simpleLinearRegression`, `LinearRegression` to `linearRegression`, `LogisticRegression` to `logisticRegression`. [#5391](https://github.com/yandex/ClickHouse/pull/5391) ([Nikolai Kochetov](https://github.com/KochetovNicolai))
 
 ### Performance Improvements
-* Paralellize processing of parts of non-replicated MergeTree tables in ALTER MODIFY query. [#4639](https://github.com/yandex/ClickHouse/pull/4639) ([Ivan Kush](https://github.com/IvanKush))
+* Parallelize processing of parts of non-replicated MergeTree tables in ALTER MODIFY query. [#4639](https://github.com/yandex/ClickHouse/pull/4639) ([Ivan Kush](https://github.com/IvanKush))
 * Optimizations in regular expressions extraction. [#5193](https://github.com/yandex/ClickHouse/pull/5193) [#5191](https://github.com/yandex/ClickHouse/pull/5191) ([Danila Kutenin](https://github.com/danlark1))
 * Do not add right join key column to join result if it's used only in join on section. [#5260](https://github.com/yandex/ClickHouse/pull/5260) ([Artem Zuikov](https://github.com/4ertus2))
 * Freeze the Kafka buffer after first empty response. It avoids multiple invokations of `ReadBuffer::next()` for empty result in some row-parsing streams. [#5283](https://github.com/yandex/ClickHouse/pull/5283) ([Ivan](https://github.com/abyss7))
@@ -599,7 +599,7 @@ lee](https://github.com/neverlee))
 * Fix error `Unknown log entry type: 0` after `OPTIMIZE TABLE FINAL` query. [#4683](https://github.com/yandex/ClickHouse/pull/4683) ([Amos Bird](https://github.com/amosbird))
 * Wrong arguments to `hasAny` or `hasAll` functions may lead to segfault. [#4698](https://github.com/yandex/ClickHouse/pull/4698) ([alexey-milovidov](https://github.com/alexey-milovidov))
 * Deadlock may happen while executing `DROP DATABASE dictionary` query. [#4701](https://github.com/yandex/ClickHouse/pull/4701) ([alexey-milovidov](https://github.com/alexey-milovidov))
-* Fix undefinied behavior in `median` and `quantile` functions. [#4702](https://github.com/yandex/ClickHouse/pull/4702) ([hcz](https://github.com/hczhcz))
+* Fix undefined behavior in `median` and `quantile` functions. [#4702](https://github.com/yandex/ClickHouse/pull/4702) ([hcz](https://github.com/hczhcz))
 * Fix compression level detection when `network_compression_method` in lowercase. Broken in v19.1. [#4706](https://github.com/yandex/ClickHouse/pull/4706) ([proller](https://github.com/proller))
 * Fixed ignorance of `<timezone>UTC</timezone>` setting (fixes issue [#4658](https://github.com/yandex/ClickHouse/issues/4658)). [#4718](https://github.com/yandex/ClickHouse/pull/4718) ([proller](https://github.com/proller))
 * Fix `histogram` function behaviour with `Distributed` tables. [#4741](https://github.com/yandex/ClickHouse/pull/4741) ([olegkv](https://github.com/olegkv))
@@ -668,7 +668,7 @@ lee](https://github.com/neverlee))
 * Fix error `Unknown log entry type: 0` after `OPTIMIZE TABLE FINAL` query. [#4683](https://github.com/yandex/ClickHouse/pull/4683) ([Amos Bird](https://github.com/amosbird))
 * Wrong arguments to `hasAny` or `hasAll` functions may lead to segfault. [#4698](https://github.com/yandex/ClickHouse/pull/4698) ([alexey-milovidov](https://github.com/alexey-milovidov))
 * Deadlock may happen while executing `DROP DATABASE dictionary` query. [#4701](https://github.com/yandex/ClickHouse/pull/4701) ([alexey-milovidov](https://github.com/alexey-milovidov))
-* Fix undefinied behavior in `median` and `quantile` functions. [#4702](https://github.com/yandex/ClickHouse/pull/4702) ([hcz](https://github.com/hczhcz))
+* Fix undefined behavior in `median` and `quantile` functions. [#4702](https://github.com/yandex/ClickHouse/pull/4702) ([hcz](https://github.com/hczhcz))
 * Fix compression level detection when `network_compression_method` in lowercase. Broken in v19.1. [#4706](https://github.com/yandex/ClickHouse/pull/4706) ([proller](https://github.com/proller))
 * Fixed ignorance of `<timezone>UTC</timezone>` setting (fixes issue [#4658](https://github.com/yandex/ClickHouse/issues/4658)). [#4718](https://github.com/yandex/ClickHouse/pull/4718) ([proller](https://github.com/proller))
 * Fix `histogram` function behaviour with `Distributed` tables. [#4741](https://github.com/yandex/ClickHouse/pull/4741) ([olegkv](https://github.com/olegkv))
@@ -850,7 +850,7 @@ lee](https://github.com/neverlee))
 * Added aggregate function `entropy` which computes Shannon entropy. [#4238](https://github.com/yandex/ClickHouse/pull/4238) ([Quid37](https://github.com/Quid37))
 * Added ability to send queries `INSERT INTO tbl VALUES (....` to server without splitting on `query` and `data` parts. [#4301](https://github.com/yandex/ClickHouse/pull/4301) ([alesapin](https://github.com/alesapin))
 * Generic implementation of `arrayWithConstant` function was added. [#4322](https://github.com/yandex/ClickHouse/pull/4322) ([alexey-milovidov](https://github.com/alexey-milovidov))
-* Implented `NOT BETWEEN` comparison operator. [#4228](https://github.com/yandex/ClickHouse/pull/4228) ([Dmitry Naumov](https://github.com/nezed))
+* Implemented `NOT BETWEEN` comparison operator. [#4228](https://github.com/yandex/ClickHouse/pull/4228) ([Dmitry Naumov](https://github.com/nezed))
 * Implement `sumMapFiltered` in order to be able to limit the number of keys for which values will be summed by `sumMap`. [#4129](https://github.com/yandex/ClickHouse/pull/4129) ([Léo Ercolanelli](https://github.com/ercolanelli-leo))
 * Added support of `Nullable` types in `mysql` table function. [#4198](https://github.com/yandex/ClickHouse/pull/4198) ([Emmanuel Donin de Rosière](https://github.com/edonin))
 * Support for arbitrary constant expressions in `LIMIT` clause. [#4246](https://github.com/yandex/ClickHouse/pull/4246) ([k3box](https://github.com/k3box))
@@ -925,7 +925,7 @@ lee](https://github.com/neverlee))
 * Added keyword `INDEX` in `CREATE TABLE` query. A column with name `index` must be quoted with backticks or double quotes: `` `index` ``.  [#4143](https://github.com/yandex/ClickHouse/pull/4143) ([Nikita Vasilev](https://github.com/nikvas0))
 * `sumMap` now promote result type instead of overflow. The old `sumMap` behavior can be obtained by using `sumMapWithOverflow` function. [#4151](https://github.com/yandex/ClickHouse/pull/4151) ([Léo Ercolanelli](https://github.com/ercolanelli-leo))
 
-### Performance Impovements
+### Performance Improvements
 * `std::sort` replaced by `pdqsort` for queries without `LIMIT`. [#4236](https://github.com/yandex/ClickHouse/pull/4236) ([Evgenii Pravda](https://github.com/kvinty))
 * Now server reuse threads from global thread pool. This affects performance in some corner cases. [#4150](https://github.com/yandex/ClickHouse/pull/4150) ([alexey-milovidov](https://github.com/alexey-milovidov))