Bump the npm_and_yarn group across 1 directory with 2 updates (#1188)

Bumps the npm_and_yarn group with 2 updates in the /repl/appengine/web directory: [webpack-dev-server](https://github.com/webpack/webpack-dev-server) and [@angular-devkit/build-angular](https://github.com/angular/angular-cli).


Updates `webpack-dev-server` from 5.2.0 to 5.2.1
- [Release notes](https://github.com/webpack/webpack-dev-server/releases)
- [Changelog](https://github.com/webpack/webpack-dev-server/blob/master/CHANGELOG.md)
- [Commits](webpack/webpack-dev-server@v5.2.0...v5.2.1)

Updates `@angular-devkit/build-angular` from 19.1.3 to 20.0.1
- [Release notes](https://github.com/angular/angular-cli/releases)
- [Changelog](https://github.com/angular/angular-cli/blob/main/CHANGELOG.md)
- [Commits](angular/angular-cli@19.1.3...20.0.1)

---
updated-dependencies:
- dependency-name: webpack-dev-server
  dependency-version: 5.2.1
  dependency-type: indirect
  dependency-group: npm_and_yarn
- dependency-name: "@angular-devkit/build-angular"
  dependency-version: 20.0.1
  dependency-type: direct:development
  dependency-group: npm_and_yarn
...

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Author: dependabot[bot]