Bump webpack-dev-server and @angular-devkit/build-angular in /frontend

Bumps [webpack-dev-server](https://github.com/webpack/webpack-dev-server) to 5.2.5 and updates ancestor dependency [@angular-devkit/build-angular](https://github.com/angular/angular-cli). These dependencies need to be updated together.


Updates `webpack-dev-server` from 5.2.2 to 5.2.5
- [Release notes](https://github.com/webpack/webpack-dev-server/releases)
- [Changelog](https://github.com/webpack/webpack-dev-server/blob/main/CHANGELOG.md)
- [Commits](https://github.com/webpack/webpack-dev-server/compare/v5.2.2...v5.2.5)

Updates `@angular-devkit/build-angular` from 20.3.25 to 20.3.31
- [Release notes](https://github.com/angular/angular-cli/releases)
- [Changelog](https://github.com/angular/angular-cli/blob/main/CHANGELOG.md)
- [Commits](https://github.com/angular/angular-cli/compare/v20.3.25...v20.3.31)

---
updated-dependencies:
- dependency-name: "@angular-devkit/build-angular"
  dependency-version: 20.3.29
  dependency-type: direct:production
- dependency-name: webpack-dev-server
  dependency-version: 5.2.5
  dependency-type: indirect
...

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

frontend/package.json

@@ -59,7 +59,7 @@
     "cypress:run:ci:parameterized": "node update-config.js TESTNET_ENABLED=true TESTNET4_ENABLED=true SIGNET_ENABLED=true LIQUID_ENABLED=true ITEMS_PER_PAGE=25 && npm run generate-config && start-server-and-test serve:parameterized 4200 cypress:run:record"
   },
   "dependencies": {
-    "@angular-devkit/build-angular": "^20.3.25",
+    "@angular-devkit/build-angular": "^20.3.31",
     "@angular/animations": "^20.3.25",
     "@angular/cli": "^20.3.25",
     "@angular/common": "^20.3.25",