Bump markdownlint from 0.26.2 to 0.30.0 (demisto#28899)

Bumps [markdownlint](https://github.com/DavidAnson/markdownlint) from 0.26.2 to 0.30.0.
- [Changelog](https://github.com/DavidAnson/markdownlint/blob/main/CHANGELOG.md)
- [Commits](DavidAnson/markdownlint@v0.26.2...v0.30.0)

---
updated-dependencies:
- dependency-name: markdownlint
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Koby Meir <kobymeir@users.noreply.github.com>

package.json

@@ -22,7 +22,7 @@
     "@mdx-js/mdx": "^1.6.22",
     "commander": "^5.1.0",
     "fs-extra": "^8.1.0",
-    "markdownlint": "^0.26.2",
+    "markdownlint": "^0.30.0",
     "markdownlint-rule-helpers": "^0.17.2"
   }
 }