chore(deps): update stefanzweifel/git-auto-commit-action action to v6

Author: renovate[bot]

.github/workflows/update-changelog.yml

@@ -21,7 +21,7 @@ jobs:
           release-notes: ${{ github.event.release.body }}
 
       - name: Commit updated CHANGELOG
-        uses: stefanzweifel/git-auto-commit-action@v5
+        uses: stefanzweifel/git-auto-commit-action@778341af668090896ca464160c2def5d1d1a3eb0 # v6.0.1
         with:
           branch: main
           commit_message: Update CHANGELOG