Fix gitpython check

.github/workflows/docs.yml

@@ -12,7 +12,7 @@ jobs:
 
     steps:
     - uses: actions/checkout@v3
-      with: 
+      with:
         ref: ${{ github.head_ref }}
         fetch-depth: 1
         fetch-tags: True

devtools/check_changelog.py

@@ -26,7 +26,7 @@ class ChangelogError(Exception):
 # Check if the developer is on the main branch
 # We check if the head commit is the same as the main branch head commit
 # as the CI will be in detached head state
-if repo.head.commit == repo.branches["main"].commit:
+if repo.active_branch.name == 'main':
     print("You are on the main branch. Nothing to check.")
     exit(0)