chore: unpin gha in renovate and update link checker workflow

Signed-off-by: Devin Buhl <devin@buhl.casa>

.github/workflows/meta-labeler.yaml

@@ -15,7 +15,7 @@ jobs:
       pull-requests: write
     steps:
       - name: Labeler
-        uses: actions/labeler@8558fd74291d67161a8a78ce36a881fa63b766a9 # v5.0.0
+        uses: actions/labeler@v5
         with:
           configuration-path: .github/labeler.yaml
           repo-token: "${{ secrets.GITHUB_TOKEN }}"