add latest Python version to workflow

.github/workflows/extract_otp_secret_keys.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10"]
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.x"]
 
     steps:
       - uses: actions/checkout@v3

.gitignore

@@ -7,3 +7,5 @@ venv/
 !devbox.json
 !example_output.json
 !example_output.csv
+!.github/
+!.flake8