chore(deps-dev): Bump workbox-webpack-plugin in /build/frontend-legacy

Bumps [workbox-webpack-plugin](https://github.com/googlechrome/workbox) from 7.4.0 to 7.4.1.
- [Release notes](https://github.com/googlechrome/workbox/releases)
- [Commits](https://github.com/googlechrome/workbox/compare/v7.4.0...v7.4.1)

---
updated-dependencies:
- dependency-name: workbox-webpack-plugin
  dependency-version: 7.4.1
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

build/frontend-legacy/package.json

@@ -138,7 +138,7 @@
     "webpack": "^5.106.2",
     "webpack-cli": "^6.0.1",
     "webpack-merge": "^6.0.1",
-    "workbox-webpack-plugin": "^7.4.0"
+    "workbox-webpack-plugin": "^7.4.1"
   },
   "engines": {
     "node": "^24.0.0",