github: labeler: Update dependencies

Update to the most recent version.
The biggest change is the switch to Node.js 24.

Link: https://github.com/openwrt/openwrt/pull/22903
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
(cherry picked from commit 05b6a93173)
Link: https://github.com/openwrt/openwrt/pull/24318
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

.github/workflows/labeler.yml

@@ -14,7 +14,7 @@ jobs:
     name: Pull Request Labeler
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/labeler@v5
+      - uses: actions/labeler@v6
         with:
           repo-token: '${{ secrets.GITHUB_TOKEN }}'