Remove Python 3.10 again. Some of the dependencies are apparently not yet ready for the new version

Author: chr1st1ank

.github/workflows/code_quality.yml

@@ -37,7 +37,7 @@ jobs:
     strategy:
       max-parallel: 4
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10.0-alpha.6"]
+        python-version: ["3.7", "3.8", "3.9"]
 
     steps:
       - name: Set up Python ${{ matrix.python-version }}