Merge pull request #1 from open-mpi/pr/update-github-actions

action.yaml: update to newer Github actions versions

Author: jsquyres

action.yaml

@@ -12,7 +12,7 @@ runs:
   using: composite
   steps:
     - name: Setup Python
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v4
       with:
         python-version: '3.x'