chore(regions): Add backport-v3 label (#3684)

.github/workflows/refresh_aws_services_regions.yml

@@ -55,7 +55,7 @@ jobs:
           token: ${{ secrets.PROWLER_ACCESS_TOKEN }}
           commit-message: "feat(regions_update): Update regions for AWS services."
           branch: "aws-services-regions-updated-${{ github.sha }}"
-          labels: "status/waiting-for-revision, severity/low, provider/aws"
+          labels: "status/waiting-for-revision, severity/low, provider/aws, backport-v3"
           title: "chore(regions_update): Changes in regions for AWS services."
           body: |
             ### Description