fix: remove --allow-added-labels option from label sync command

Author: tusharmath

.github/workflows/labels.yml

@@ -36,5 +36,4 @@ jobs:
         npx github-label-sync \
           --access-token ${{ secrets.GITHUB_TOKEN }} \
           --labels ".github/labels.json" \
-          --allow-added-labels \
           ${{ github.repository }}