Try serializing steps for installing py3-venv -> creating venv

.gitea/workflows/ci-pipeline.yaml

@@ -20,6 +20,7 @@ jobs:
         python3 -c "print('Python is installed')"
 
     - name: Install python3-venv
+      id: install
       run: |
         apt-get update && apt-get install python3-virtualenv -y
 
@@ -27,6 +28,8 @@ jobs:
       run: |
         python3 -m venv venv
         source venv/bin/activate
+      # https://docs.github.com/en/actions/learn-github-actions/contexts#steps-context
+      if: steps.install.outcome == 'success'
 
     - name: Install dependencies
       run: |