The Python language-binding needs python>=3.9 (#2228)

Update python language binding setup.py and document
Make compile.sh executable: `chmod +x compile.sh`

language-bindings/python/README.md

@@ -4,6 +4,8 @@ The WAMR Python package contains a set of high-level bindings for WAMR API and W
 
 ## Installation
 
+* **Notice**: This python package need python >= `3.9`.
+
 To Install from local source tree in _development mode_ run the following command,
 
 ```bash