build(deps-dev): bump webpack-merge from 5.10.0 to 6.0.1 in /frontend (#2368)

Bumps [webpack-merge](https://github.com/survivejs/webpack-merge) from 5.10.0 to 6.0.1.
- [Changelog](https://github.com/survivejs/webpack-merge/blob/develop/CHANGELOG.md)
- [Commits](survivejs/webpack-merge@v5.10.0...v6.0.1)

---
updated-dependencies:
- dependency-name: webpack-merge
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

frontend/package-lock.json

@@ -48,7 +48,7 @@
     "webpack": "^5.91.0",
     "webpack-cli": "^5.1.4",
     "webpack-dev-server": "^5.0.4",
-    "webpack-merge": "^5.10.0"
+    "webpack-merge": "^6.0.1"
   },
   "dependencies": {
     "chartist": "^0.11.3",