Fix invalid format

Author: mdpiper

.github/workflows/flake8.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-        uses: actions/setup-python@v4
+      - uses: actions/setup-python@v4
         with:
           python-version: "3.11"