fix python version selection in GitHub action

Author: imrehg

.github/workflows/python.yaml

@@ -13,6 +13,7 @@ jobs:
     name: "Lint & test"
     strategy:
       matrix:
+        # Needs to be string for 3.10, otherwise it's wrongly parsed as 3.1
         python-version: ['3.10']
     runs-on: ubuntu-latest
 
@@ -64,6 +65,7 @@ jobs:
       - name: Set up Python 3.10
         uses: actions/setup-python@v1
         with:
+          # Needs to be string for 3.10, otherwise it's wrongly parsed as 3.1
           python-version: '3.10'
 
       - name: Publish