add hoverkraft-tech/compose-action

Author: spompea-cfa

.github/workflows/python-unittest.yaml

@@ -21,6 +21,7 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+    - uses: hoverkraft-tech/compose-action@b716db5b717cb9b81e391fe638e5aceaa2299e43 # v2.4.0
     - name: Run unittest tests
       run: |
         python3 -c "print('hello world')"