build(deps-dev): bump webpack in /build/frontend-legacy

Bumps [webpack](https://github.com/webpack/webpack) from 5.102.1 to 5.103.0.
- [Release notes](https://github.com/webpack/webpack/releases)
- [Commits](webpack/webpack@v5.102.1...v5.103.0)

---
updated-dependencies:
- dependency-name: webpack
  dependency-version: 5.103.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

build/frontend-legacy/package-lock.json

@@ -135,7 +135,7 @@
     "vitest": "^4.0.13",
     "vue-loader": "^15.11.1",
     "vue-template-compiler": "^2.7.16",
-    "webpack": "^5.102.1",
+    "webpack": "^5.103.0",
     "webpack-cli": "^6.0.1",
     "webpack-merge": "^6.0.1",
     "workbox-webpack-plugin": "^7.3.0"