Bump umbrelladocs/action-linkspector from 1.3.7 to 1.4.0

Bumps [umbrelladocs/action-linkspector](https://github.com/umbrelladocs/action-linkspector) from 1.3.7 to 1.4.0.
- [Release notes](https://github.com/umbrelladocs/action-linkspector/releases)
- [Commits](UmbrellaDocs/action-linkspector@v1.3.7...v1.4.0)

---
updated-dependencies:
- dependency-name: umbrelladocs/action-linkspector
  dependency-version: 1.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

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

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v5
-      - uses: umbrelladocs/action-linkspector@v1.3.7
+      - uses: umbrelladocs/action-linkspector@v1.4.0
         with:
           github_token: ${{ secrets.github_token }}
           reporter: github-pr-check