build(deps-dev): bump webpack-dev-server from 3.11.2 to 5.2.1 in /sample

Bumps [webpack-dev-server](https://github.com/webpack/webpack-dev-server) from 3.11.2 to 5.2.1.
- [Release notes](https://github.com/webpack/webpack-dev-server/releases)
- [Changelog](https://github.com/webpack/webpack-dev-server/blob/master/CHANGELOG.md)
- [Commits](webpack/webpack-dev-server@v3.11.2...v5.2.1)

---
updated-dependencies:
- dependency-name: webpack-dev-server
  dependency-version: 5.2.1
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

sample/package.json

@@ -15,7 +15,7 @@
     "url-safe-base64": "^1.1.1",
     "webpack": "^5.76.0",
     "webpack-cli": "^4.2.0",
-    "webpack-dev-server": "^3.11.0"
+    "webpack-dev-server": "^5.2.1"
   },
   "engines": {
     "node": ">=12"