chore(deps): update angular-cli monorepo to v21

Author: renovate[bot]

package.json

@@ -56,13 +56,13 @@
     "zone.js": "0.15.1"
   },
   "devDependencies": {
-    "@angular-devkit/build-angular": "20.3.12",
+    "@angular-devkit/build-angular": "21.0.0",
     "@angular-eslint/builder": "20.7.0",
     "@angular-eslint/eslint-plugin": "20.7.0",
     "@angular-eslint/eslint-plugin-template": "20.7.0",
     "@angular-eslint/schematics": "20.7.0",
     "@angular-eslint/template-parser": "20.7.0",
-    "@angular/cli": "20.3.12",
+    "@angular/cli": "21.0.1",
     "@angular/compiler-cli": "20.3.13",
     "@types/jasmine": "5.1.13",
     "@types/node": "22.19.1",