Update and rename flake.yml to flake8.yml

Author: kgashok

.github/workflows/flake.yml renamed to .github/workflows/flake8.yml

@@ -18,5 +18,5 @@ jobs:
       - name: Run flake8
         uses: TrueBrain/actions-flake8@master
         with:
-          src: Sources/code
+          path: Sources/code
           ignore: E9,F63,F7,F82