Bump webpack-merge from 5.10.0 to 6.0.1 in /server/frontend

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-version: 6.0.1
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

server/frontend/package-lock.json

@@ -49,6 +49,6 @@
     "vue-loader": "^17.4.2",
     "webpack": "^5.94.0",
     "webpack-cli": "^5.1.4",
-    "webpack-merge": "^5.10.0"
+    "webpack-merge": "^6.0.1"
   }
 }