chore(deps): update actions/labeler action to v6

Author: shamubot[bot]

.github/workflows/meta-labeler.yaml

@@ -15,6 +15,6 @@ jobs:
       pull-requests: write
     steps:
     - name: Labeler
-      uses: actions/labeler@8558fd74291d67161a8a78ce36a881fa63b766a9 # v5
+      uses: actions/labeler@634933edcd8ababfe52f92936142cc22ac488b1b # v6
       with:
         configuration-path: .github/labeler.yaml