ci: Add labels to gitflow PRs (#6997)

Author: mydea

.github/workflows/gitflow-sync-develop.yml

@@ -32,6 +32,7 @@ jobs:
           destination_branch: ${{ env.DEV_BRANCH }}
           pr_title: '[Gitflow] Merge ${{ github.ref_name }} into ${{ env.DEV_BRANCH }}'
           pr_body: 'Merge ${{ github.ref_name }} branch into ${{ env.DEV_BRANCH }}'
+          pr_label: 'Dev: Gitflow'
 
       # https://github.com/marketplace/actions/enable-pull-request-automerge
       - name: Enable automerge for PR

.github/workflows/gitflow-sync-master.yml

@@ -34,6 +34,7 @@ jobs:
           destination_branch: ${{ env.MAIN_BRANCH }}
           pr_title: '[Gitflow] Merge ${{ github.ref_name }} into ${{ env.MAIN_BRANCH }}'
           pr_body: 'Merge ${{ github.ref_name }} branch into ${{ env.MAIN_BRANCH }}'
+          pr_label: 'Dev: Gitflow'
 
       # https://github.com/marketplace/actions/enable-pull-request-automerge
       - name: Enable automerge for PR