docs: update examples/jdbc demo readme (#18499)

* docs: update csharp connector status

* docs: fix csharp ws bulk pulling

* docs: clarify database param is optional to websocket dsn

* docs: fix python version and a few typos

* docs: fix jdbc version in connector matrix

* docs: update jdbc demo readme

examples/JDBC/taosdemo/pom.xml

@@ -88,7 +88,7 @@
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>
             <artifactId>log4j-core</artifactId>
-            <version>2.17.1</version>
+            <version>2.17.2</version>
         </dependency>
         <!-- junit -->
         <dependency>

examples/JDBC/taosdemo/readme.md

@@ -2,12 +2,10 @@
 cd tests/examples/JDBC/taosdemo
 mvn clean package -Dmaven.test.skip=true
 # 先建表，再插入的
-java -jar target/taosdemo-2.0.1-jar-with-dependencies.jar -host [hostname] -database [database] -doCreateTable true -superTableSQL "create table weather(ts timestamp, f1 int) tags(t1 nchar(4))" -numOfTables 1000 -numOfRowsPerTable 100000000 -numOfThreadsForInsert 10 -numOfTablesPerSQL 10 -numOfValuesPerSQL 100
+java -jar target/taosdemo-2.0.1-jar-with-dependencies.jar -host <hostname> -database <db name> -doCreateTable true -superTableSQL "create table weather(ts timestamp, f1 int) tags(t1 nchar(4))" -numOfTables 1000 -numOfRowsPerTable 100000000 -numOfThreadsForInsert 10 -numOfTablesPerSQL 10 -numOfValuesPerSQL 100
 # 不建表，直接插入的
-java -jar target/taosdemo-2.0.1-jar-with-dependencies.jar -host [hostname] -database [database] -doCreateTable false -superTableSQL "create table weather(ts timestamp, f1 int) tags(t1 nchar(4))" -numOfTables 1000 -numOfRowsPerTable 100000000 -numOfThreadsForInsert 10 -numOfTablesPerSQL 10 -numOfValuesPerSQL 100
+java -jar target/taosdemo-2.0.1-jar-with-dependencies.jar -host <hostname> -database <db name> -doCreateTable false -superTableSQL "create table weather(ts timestamp, f1 int) tags(t1 nchar(4))" -numOfTables 1000 -numOfRowsPerTable 100000000 -numOfThreadsForInsert 10 -numOfTablesPerSQL 10 -numOfValuesPerSQL 100
 ```
 
-需求：
-1. 可以读lowa的配置文件
-2. 支持JDBC-JNI和JDBC-restful
-3. 读取配置文件，持续执行查询
\ No newline at end of file
+如果发生错误 Exception in thread "main" java.lang.UnsatisfiedLinkError: no taos in java.library.path
+请检查是否安装 TDengine 客户端安装包或编译 TDengine 安装。如果确定已经安装过还出现这个错误，可以在命令行 java 后加 -Djava.library.path=/usr/local/lib 来指定寻找共享库的路径。