Merge pull request #16169 from taosdata/zhaoyanggh-patch-10

Update _sub_python.mdx

docs/zh/07-develop/_sub_python.mdx

 ```py
-{{#include docs/examples/python/subscribe_demo.py}}
-```
\ No newline at end of file
+{{#include docs/examples/python/tmq_example.py}}
+```