build(deps-dev): bump stylelint from 16.19.1 to 16.20.0 in /templates (#10693)

Bumps [stylelint](https://github.com/stylelint/stylelint) from 16.19.1 to 16.20.0.
- [Release notes](https://github.com/stylelint/stylelint/releases)
- [Changelog](https://github.com/stylelint/stylelint/blob/main/CHANGELOG.md)
- [Commits](stylelint/stylelint@16.19.1...16.20.0)

---
updated-dependencies:
- dependency-name: stylelint
  dependency-version: 16.20.0
  dependency-type: direct:development
  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>

Author: dependabot[bot]

templates/package-lock.json

@@ -48,7 +48,7 @@
     "esbuild-sass-plugin": "~3.3.1",
     "eslint": "^8.57.1",
     "eslint-config-standard": "^17.1.0",
-    "stylelint": "^16.19.1",
+    "stylelint": "^16.20.0",
     "stylelint-config-standard-scss": "^15.0.1",
     "typescript": "^5.8.3",
     "yargs": "^18.0.0"