NPM: Bump the npm-dependencies group with 2 updates

Bumps the npm-dependencies group with 2 updates: [mermaid](https://github.com/mermaid-js/mermaid) and [stylelint](https://github.com/stylelint/stylelint).


Updates `mermaid` from 11.7.0 to 11.8.0
- [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]@11.8.0)

Updates `stylelint` from 16.21.0 to 16.21.1
- [Release notes](https://github.com/stylelint/stylelint/releases)
- [Changelog](https://github.com/stylelint/stylelint/blob/main/CHANGELOG.md)
- [Commits](stylelint/stylelint@16.21.0...16.21.1)

---
updated-dependencies:
- dependency-name: mermaid
  dependency-version: 11.8.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: npm-dependencies
- dependency-name: stylelint
  dependency-version: 16.21.1
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: npm-dependencies
...

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

Author: dependabot[bot]

package-lock.json

@@ -11,7 +11,7 @@
         "@hotwired/stimulus": "^3.2.1",
         "@hotwired/turbo": "^7.3.0",
         "highlight.js": "^11.11.1",
-        "mermaid": "^11.7.0",
+        "mermaid": "^11.8.0",
         "normalize.css": "^8.0.1",
         "vega": "^6.1.2",
         "vega-tooltip": "^1.0.0"
@@ -21,7 +21,7 @@
         "esbuild-sass-plugin": "^3.3.1",
         "postcss": "^8.5.6",
         "prettier": "^3.6.2",
-        "stylelint": "^16.21.0",
+        "stylelint": "^16.21.1",
         "stylelint-config-standard-scss": "^15.0.1",
         "stylelint-order": "^7.0.0",
         "stylelint-scss": "^6.12.1"