build: update cross-repo angular dependencies to v21.0.0-rc.4

See associated pull request for more information.

Author: angular-robot

bazel/integration/tests/angular-cli/package.json

@@ -22,8 +22,8 @@
     "tslib": "^2.8.1"
   },
   "devDependencies": {
-    "@angular/build": "21.0.0-rc.3",
-    "@angular/cli": "21.0.0-rc.3",
+    "@angular/build": "21.0.0-rc.4",
+    "@angular/cli": "21.0.0-rc.4",
     "@angular/compiler-cli": "21.0.0-rc.2",
     "@types/jasmine": "~5.1.9",
     "@types/node": "^22.0.0",