Bump DavidAnson/markdownlint-cli2-action from 17.0.0 to 18.0.0

Bumps [DavidAnson/markdownlint-cli2-action](https://github.com/davidanson/markdownlint-cli2-action) from 17.0.0 to 18.0.0.
- [Release notes](https://github.com/davidanson/markdownlint-cli2-action/releases)
- [Commits](DavidAnson/markdownlint-cli2-action@db43aef...eb5ca3a)

---
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/docs.yml

@@ -41,6 +41,6 @@ jobs:
         with:
           fetch-depth: 0
       - name: "Check Markdown documents"
-        uses: DavidAnson/markdownlint-cli2-action@db43aef879112c3119a410d69f66701e0d530809 # v17.0.0
+        uses: DavidAnson/markdownlint-cli2-action@eb5ca3ab411449c66620fe7f1b3c9e10547144b0 # v18.0.0
         with:
           globs: '**/*.md'