Do not fail fast in GitHub actions

This allows all successful tests to pass and reduces the time required to test PRs that fail due to temporary issues

Author: alessfg

.github/workflows/molecule.yml

@@ -18,6 +18,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
+        fail-fast: false
         scenario:
           - default
           - downgrade