chore: bump actions/labeler from 6 to 7 (#993)

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.github/workflows/pr-labeler.yml

@@ -19,7 +19,7 @@ jobs:
     timeout-minutes: 5
     steps:
       - name: Label by changed files
-        uses: actions/labeler@v6
+        uses: actions/labeler@v7
         with:
           dot: true
           sync-labels: false