[Docs Site] Bump mermaid from 11.5.0 to 11.6.0 (#21148)

Bumps [mermaid](https://github.com/mermaid-js/mermaid) from 11.5.0 to 11.6.0.
- [Release notes](https://github.com/mermaid-js/mermaid/releases)
- [Changelog](https://github.com/mermaid-js/mermaid/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/mermaid-js/mermaid/compare/[email protected]@11.6.0)

---
updated-dependencies:
- dependency-name: mermaid
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package-lock.json

@@ -79,7 +79,7 @@
 		"mdast-util-from-markdown": "2.0.2",
 		"mdast-util-mdx": "3.0.0",
 		"mdast-util-mdx-expression": "2.0.1",
-		"mermaid": "11.5.0",
+		"mermaid": "11.6.0",
 		"micromark-extension-mdxjs": "3.0.0",
 		"node-html-parser": "7.0.1",
 		"openapi-types": "12.1.3",