Bump stylelint from 16.14.1 to 16.15.0

Bumps [stylelint](https://github.com/stylelint/stylelint) from 16.14.1 to 16.15.0.
- [Release notes](https://github.com/stylelint/stylelint/releases)
- [Changelog](https://github.com/stylelint/stylelint/blob/main/CHANGELOG.md)
- [Commits](stylelint/stylelint@16.14.1...16.15.0)

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

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

package.json

@@ -15,7 +15,7 @@
     "html-validate": "9.3.0",
     "pa11y": "8.0.0",
     "sitespeed.io": "36.4.1",
-    "stylelint": "16.14.1",
+    "stylelint": "16.15.0",
     "eslint": "9.21.0",
     "globals": "14.0.0",
     "vnu-jar": "23.4.11",