Adapt github action to build PR version

.github/workflows/ansible.yml

@@ -5,7 +5,7 @@ on: [push, pull_request]
 
 jobs:
   # https://molecule.readthedocs.io/en/latest/ci.html#github-actions
-  test:
+  test-fresh:
     runs-on: ubuntu-latest
     # https://docs.github.com/en/free-pro-team@latest/actions/reference/context-and-expression-syntax-for-github-actions#github-context
     if: github.event_name == 'pull_request' || (github.event_name == 'push' && contains(github.ref, 'refs/heads/'))
@@ -31,6 +31,27 @@ jobs:
           cd ansible
           molecule test -s fresh
         working-directory: "${{ github.repository }}"
+  test-update:
+    runs-on: ubuntu-latest
+    # https://docs.github.com/en/free-pro-team@latest/actions/reference/context-and-expression-syntax-for-github-actions#github-context
+    if: github.event_name == 'pull_request' || (github.event_name == 'push' && contains(github.ref, 'refs/heads/'))
+    steps:
+      - name: Check out the codebase
+        uses: actions/checkout@v2
+        with:
+          path: "${{ github.repository }}"
+      - name: Set up Python
+        uses: actions/setup-python@v2
+      - name: Set up Docker
+        uses: docker-practice/actions-setup-docker@master
+      - name: Install dependencies
+        run: |
+          python3 -m pip install --upgrade pip
+          python3 -m pip install molecule[ansible,docker]
+          ansible --version
+          docker --version
+          molecule --version
+          python --version
       - name: Test release update with molecule
         run: |
           cd ansible