Bump actions/labeler from 4.0.2 to 4.0.3 (flutter#3411)

Bump actions/labeler from 4.0.2 to 4.0.3

Author: dependabot[bot]

.github/workflows/pull_request_label.yml

@@ -21,7 +21,7 @@ jobs:
       pull-requests: write
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/labeler@5c7539237e04b714afd8ad9b4aed733815b9fab4
+      - uses: actions/labeler@ba790c862c380240c6d5e7427be5ace9a05c754b
         with:
           repo-token: "${{ secrets.GITHUB_TOKEN }}"
           sync-labels: true