Update index.md

docs/en/sql-reference/window-functions/index.md

@@ -26,22 +26,33 @@ ClickHouse supports the standard grammar for defining windows and window functio
 ## References
 
 ### GitHub Issues
+
 The roadmap for the initial support of window functions is [in this issue](https://github.com/ClickHouse/ClickHouse/issues/18097).
 
 All GitHub issues related to window funtions have the [comp-window-functions](https://github.com/ClickHouse/ClickHouse/labels/comp-window-functions) tag.
 
 ### Tests
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 These tests contain the examples of the currently supported grammar:
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 https://github.com/ClickHouse/ClickHouse/blob/master/tests/performance/window_functions.xml
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 https://github.com/ClickHouse/ClickHouse/blob/master/tests/queries/0_stateless/01591_window_functions.sql
 
 ### Postgres Docs
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 https://www.postgresql.org/docs/current/sql-select.html#SQL-WINDOW
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 https://www.postgresql.org/docs/devel/sql-expressions.html#SYNTAX-WINDOW-FUNCTIONS
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 https://www.postgresql.org/docs/devel/functions-window.html
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 https://www.postgresql.org/docs/devel/tutorial-window.html
 
 ### MySQL Docs
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 https://dev.mysql.com/doc/refman/8.0/en/window-function-descriptions.html
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 https://dev.mysql.com/doc/refman/8.0/en/window-functions-usage.html
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 https://dev.mysql.com/doc/refman/8.0/en/window-functions-frames.html