Bump umbrelladocs/action-linkspector action to v1.5.4

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/check-md-links.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
-      - uses: umbrelladocs/action-linkspector@v1.5.2
+      - uses: umbrelladocs/action-linkspector@v1.5.4
         with:
           github_token: ${{ secrets.github_token }}
           reporter: github-pr-check