Bump serialize-javascript and @angular-devkit/build-angular

Bumps [serialize-javascript](https://github.com/yahoo/serialize-javascript) to 7.0.4 and updates ancestor dependency [@angular-devkit/build-angular](https://github.com/angular/angular-cli). These dependencies need to be updated together.


Updates `serialize-javascript` from 6.0.2 to 7.0.4
- [Release notes](https://github.com/yahoo/serialize-javascript/releases)
- [Commits](yahoo/serialize-javascript@v6.0.2...v7.0.4)

Updates `@angular-devkit/build-angular` from 15.2.11 to 21.2.2
- [Release notes](https://github.com/angular/angular-cli/releases)
- [Changelog](https://github.com/angular/angular-cli/blob/main/CHANGELOG.md)
- [Commits](angular/angular-cli@15.2.11...v21.2.2)

---
updated-dependencies:
- dependency-name: serialize-javascript
  dependency-version: 7.0.4
  dependency-type: indirect
- dependency-name: "@angular-devkit/build-angular"
  dependency-version: 21.2.2
  dependency-type: direct:development
...

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Author: dependabot[bot]