Address review: add labeled/reopened triggers, bump checkout to v6

Author: mmcky

.github/workflows/review-translations.yml

@@ -5,15 +5,15 @@ name: Review Translations
 
 on:
   pull_request:
-    types: [opened, synchronize]
+    types: [opened, synchronize, labeled, reopened]
 
 jobs:
   review:
     if: contains(github.event.pull_request.labels.*.name, 'action-translation')
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 2