run-on only supports ubuntu

.github/workflows/molecule.yml

@@ -20,7 +20,7 @@ jobs:
   test:
     needs:
       - lint
-    runs-on: robertdebock/github-action-molecule:6.0.1
+    runs-on: ubuntu
     strategy:
       fail-fast: false
       matrix:
@@ -33,6 +33,12 @@ jobs:
         uses: actions/checkout@v4
         with:
           path: "${{ github.repository }}"
+      - name: Set up Python 3.
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.x'
+      - name: Install test dependencies.
+        run: pip3 install ansible molecule-docker docker
       - name: molecule
         run: molecule test
         env: