fix: add new flag in autoupdate action

trigger autoupdate workflow when autoupdate label is added

VAN-1349

.github/workflows/autoupdate-pull-request.yml

@@ -3,9 +3,17 @@ on:
   push:
     branches:
       - master
+  pull_request:
+    types: [ labeled ]  
+    branches:
+      - master  
 jobs:
   autoupdate:
     name: autoupdate
+    if: |
+      github.event_name == 'pull_request' &&
+      github.event.action == 'labeled' &&
+      github.event.label.name == 'autoupdate'
     runs-on: ubuntu-22.04
     steps:
       - uses: docker://chinthakagodawita/autoupdate-action:v1