Disable Actions tests with Python 3.6

Author: ylep

.github/workflows/tox.yaml

@@ -19,8 +19,6 @@ jobs:
         include:
         - runs-on: 'ubuntu-22.04'
           python-version: '3.7'
-        - runs-on: 'ubuntu-20.04'
-          python-version: '3.6'
     runs-on: ${{ matrix.runs-on }}
     steps:
     - uses: actions/checkout@v5.0.0