GH Actions: Bump DavidAnson/markdownlint-cli2-action

Bumps the action-runners group with 1 update: [DavidAnson/markdownlint-cli2-action](https://github.com/davidanson/markdownlint-cli2-action).


Updates `DavidAnson/markdownlint-cli2-action` from 24.1.0 to 24.2.0
- [Release notes](https://github.com/davidanson/markdownlint-cli2-action/releases)
- [Commits](DavidAnson/markdownlint-cli2-action@6bf21b0...21c1be1)

---
updated-dependencies:
- dependency-name: DavidAnson/markdownlint-cli2-action
  dependency-version: 24.2.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: action-runners
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/reusable-markdownlint.yml

@@ -28,4 +28,4 @@ jobs:
       # @link https://github.com/marketplace/actions/markdownlint-cli2-action
       - name: Check markdown with CLI2
         if: ${{ steps.has_config.outputs.files_exists == 'true' }}
-        uses: DavidAnson/markdownlint-cli2-action@6bf21b07787794f89a243495939cd651942aeabe # v24.1.0
+        uses: DavidAnson/markdownlint-cli2-action@21c1be1b93ad9ed58fa840aacc3f279cde2a72ff # v24.2.0