workflows: bump prologic/action-markdownlint from 0.27.0 to 0.28.0 (#2628)

Bumps [prologic/action-markdownlint](https://github.com/prologic/action-markdownlint) from 0.27.0 to 0.28.0.
- [Release notes](https://github.com/prologic/action-markdownlint/releases)
- [Commits](reviewdog/action-markdownlint@v0.27.0...v0.28.0)

---
updated-dependencies:
- dependency-name: prologic/action-markdownlint
  dependency-version: 0.28.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/pr-lint.yaml

@@ -28,7 +28,7 @@ jobs:
     steps:
       - uses: actions/checkout@v7
       - name: markdownlint
-        uses: prologic/action-markdownlint@v0.27.0
+        uses: prologic/action-markdownlint@v0.28.0
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           reporter: github-pr-review # Change reporter. (Only `github-pr-check` is supported at the moment).