Bump piscina and @angular-devkit/build-angular in /angular/angular

Bumps [piscina](https://github.com/piscinajs/piscina) to 5.2.0 and updates ancestor dependency [@angular-devkit/build-angular](https://github.com/angular/angular-cli). These dependencies need to be updated together.


Updates `piscina` from 3.2.0 to 5.2.0
- [Release notes](https://github.com/piscinajs/piscina/releases)
- [Changelog](https://github.com/piscinajs/piscina/blob/v5.2.0/CHANGELOG.md)
- [Commits](https://github.com/piscinajs/piscina/compare/v3.2.0...v5.2.0)

Updates `@angular-devkit/build-angular` from 13.2.6 to 21.2.19
- [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/13.2.6...v21.2.19)

---
updated-dependencies:
- dependency-name: piscina
  dependency-version: 5.2.0
  dependency-type: indirect
- dependency-name: "@angular-devkit/build-angular"
  dependency-version: 21.2.19
  dependency-type: direct:development
...

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

angular/angular/package.json

@@ -23,7 +23,7 @@
     "zone.js": "~0.11.4"
   },
   "devDependencies": {
-    "@angular-devkit/build-angular": "^13.2.6",
+    "@angular-devkit/build-angular": "^21.2.19",
     "@angular/cli": "~13.0.1",
     "@angular/compiler-cli": "~13.0.0",
     "@types/jasmine": "~3.10.0",