Add spare-checkout

- Related issue: https://github.com/actions/labeler/issues/814#issuecomment-2478374811

.github/workflows/labeler.yml

@@ -11,6 +11,11 @@ jobs:
       pull-requests: write
 
     steps:
-      - uses: actions/labeler@v4
+      - uses: actions/checkout@v4
+        with:
+          sparse-checkout: |
+            .github
+      - uses: actions/labeler@v5
         with:
           repo-token: "${{ secrets.GITHUB_TOKEN }}"
+          configuration-path: '.github/labeler.yml'