debug: Add version checks to identify CI environment difference.

Author: garotm

.github/workflows/workflow.yml

@@ -26,6 +26,8 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install -r requirements.txt
+        python -m black --version
+        python -m isort --version
     - name: Run tests and linting
       run: |
         black --check githubauthlib tests