Update python-app.yml

Author: martinrusev

.github/workflows/python-app.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.6', '3.7', '3.8', '3.9' ]
+        python-version: ['3.6', '3.7', '3.8', '3.9','3.10']
     steps:
     - uses: actions/checkout@v2
     - name: Set up Python