Update python-app.yml

remove additional quotes

.github/workflows/python-app.yml

@@ -1,6 +1,5 @@
 # This workflow will install Python dependencies, run tests and lint with a single version of Python
 # For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-python
-'''
 name: Python application
 
 on:
@@ -37,4 +36,3 @@ jobs:
     - name: Test with pytest
       run: |
         pytest
-'''