chore(ci): do not apply 'skip actions' to automatically generated commit (#6546)

Without this, Evergreen CI fails for the commit, as there is no CodeQL
SARIF report available for it.

Author: addaleax

.github/workflows/authors-and-third-party-notices.yaml

@@ -68,5 +68,5 @@ jobs:
 
       - name: Commit and push
         run: |
-          git commit --no-allow-empty -m "chore: update AUTHORS, THIRD-PARTY-NOTICES, Security Test Summary [skip actions]" || true
+          git commit --no-allow-empty -m "chore: update AUTHORS, THIRD-PARTY-NOTICES, Security Test Summary" || true
           git push