Update python-app.yml

Author: astivi

.github/workflows/python-app.yml

@@ -23,7 +23,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+        pip install -r megalist_dataflow/requirements.txt
     - name: Test with pytest
       run: |
         ./run_tests.sh