Added sudo to apt install

.github/workflows/github-action.yml

@@ -20,7 +20,7 @@ jobs:
           pip install flake8
           pip install -e .
           pip install pytest-cov responses
-          apt install ffmpeg
+          sudo apt install ffmpeg
       - name: Lint with flake8
         run: |
           # stop the build if there are Python syntax errors or undefined names