docs: fix connector python install version 3.0 (#20575)

* docs: this line is inaccurate, in current connector-python repo, it require python >= 3.6.2 because there is a dependence iso8601

* docs: append websocket doc for python connector

* docs: fix tabitem

---------
Co-authored-by: NAdam Ji <jrgwyz@163.com>

docs/en/14-reference/03-connector/07-python.mdx

@@ -124,6 +124,7 @@ For WebSocket connection, verifying that the `taosws` module can be imported suc
 import taosws
 ```
 
+</TabItem>
 </Tabs>
 
 :::tip