[Demo Dependencies]: Bump the dependencies-dev group

Bumps the dependencies-dev group in /docs-src with 3 updates: [@testing-library/react](https://github.com/testing-library/react-testing-library), [@testing-library/user-event](https://github.com/testing-library/user-event) and [sass](https://github.com/sass/dart-sass).


Updates `@testing-library/react` from 16.1.0 to 16.2.0
- [Release notes](https://github.com/testing-library/react-testing-library/releases)
- [Changelog](https://github.com/testing-library/react-testing-library/blob/main/CHANGELOG.md)
- [Commits](testing-library/react-testing-library@v16.1.0...v16.2.0)

Updates `@testing-library/user-event` from 14.5.2 to 14.6.0
- [Release notes](https://github.com/testing-library/user-event/releases)
- [Changelog](https://github.com/testing-library/user-event/blob/main/CHANGELOG.md)
- [Commits](testing-library/user-event@v14.5.2...v14.6)

Updates `sass` from 1.83.1 to 1.83.4
- [Release notes](https://github.com/sass/dart-sass/releases)
- [Changelog](https://github.com/sass/dart-sass/blob/main/CHANGELOG.md)
- [Commits](sass/dart-sass@1.83.1...1.83.4)

---
updated-dependencies:
- dependency-name: "@testing-library/react"
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: dependencies-dev
- dependency-name: "@testing-library/user-event"
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: dependencies-dev
- dependency-name: sass
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: dependencies-dev
...

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

docs-src/package.json

@@ -30,11 +30,11 @@
   },
   "devDependencies": {
     "@testing-library/jest-dom": "^6.6.3",
-    "@testing-library/react": "^16.1.0",
-    "@testing-library/user-event": "^14.5.2",
+    "@testing-library/react": "^16.2.0",
+    "@testing-library/user-event": "^14.6.0",
     "@vitejs/plugin-react": "^4.3.4",
     "rimraf": "^6.0.1",
-    "sass": "^1.83.1",
+    "sass": "^1.83.4",
     "vite": "^6.0.7",
     "vite-plugin-svgr": "^4.3.0"
   }