chore: bump DavidAnson/markdownlint-cli2-action from 17 to 18

Bumps [DavidAnson/markdownlint-cli2-action](https://github.com/davidanson/markdownlint-cli2-action) from 17 to 18.
- [Release notes](https://github.com/davidanson/markdownlint-cli2-action/releases)
- [Commits](DavidAnson/markdownlint-cli2-action@v17...v18)

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

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

Author: dependabot[bot]

.github/workflows/ci-markdownlint.yml

@@ -11,7 +11,7 @@ jobs:
 
       # equivalent cli: markdownlint-cli2  "**/*.md" "#**/CHANGELOG.md"  --config .markdownlint.json
       - name: "Markdown Lint Check"
-        uses: DavidAnson/markdownlint-cli2-action@v17
+        uses: DavidAnson/markdownlint-cli2-action@v18
         with:
           fix: false
           globs: |