Bump DavidAnson/markdownlint-cli2-action from 13 to 14

Bumps [DavidAnson/markdownlint-cli2-action](https://github.com/davidanson/markdownlint-cli2-action) from 13 to 14.
- [Release notes](https://github.com/davidanson/markdownlint-cli2-action/releases)
- [Commits](DavidAnson/markdownlint-cli2-action@v13...v14)

---
updated-dependencies:
- dependency-name: DavidAnson/markdownlint-cli2-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/tests.yml

@@ -100,7 +100,7 @@ jobs:
           submodules: 'false'
           show-progress: 'false'
       - name: markdownlint-cli2-action
-        uses: DavidAnson/markdownlint-cli2-action@v13
+        uses: DavidAnson/markdownlint-cli2-action@v14
         with:
           globs: |
             *.md