ci(python): Add permission

Author: tonestory6809

.github/workflows/python.yml

@@ -1,8 +1,8 @@
-# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
-# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-python
-
 name: Python building
 
+permissions:
+  contents: read
+
 on:
   push:
     branches: [ "async_dev" ]