Update main.yml

Author: mrbuche

.github/workflows/main.yml

@@ -7,11 +7,11 @@ on:
   workflow_dispatch:
 jobs:
   test:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.5', '3.6', '3.7', '3.8', '3.9', '3.10']
+        python-version: ['3.8', '3.9', '3.10']
     steps:
       - uses: actions/checkout@v2
       - name: python ${{ matrix.python-version }}