chore(deps): bump markdownlint-cli2

Bumps the npm-dependencies group with 1 update in the /actions/helm/generate-docs directory: [markdownlint-cli2](https://github.com/DavidAnson/markdownlint-cli2).


Updates `markdownlint-cli2` from 0.21.0 to 0.22.0
- [Changelog](https://github.com/DavidAnson/markdownlint-cli2/blob/main/CHANGELOG.md)
- [Commits](DavidAnson/markdownlint-cli2@v0.21.0...v0.22.0)

---
updated-dependencies:
- dependency-name: markdownlint-cli2
  dependency-version: 0.22.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: npm-dependencies
...

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

Author: dependabot[bot]

actions/helm/generate-docs/package-lock.json

@@ -2,7 +2,7 @@
   "name": "generate-docs",
   "dependencies": {
     "@textlint/textlint-plugin-markdown": "^15.5.2",
-    "markdownlint-cli2": "^0.21.0",
+    "markdownlint-cli2": "^0.22.0",
     "prettier": "^3.8.1",
     "textlint": "^15.5.2",
     "textlint-filter-rule-comments": "^1.3.0",