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

Author: renovate[bot]

package.json

@@ -46,11 +46,11 @@
   },
   "devDependencies": {
     "@angular-devkit/build-ng-packagr": "^0.1002.0",
-    "@angular-eslint/builder": "20.1.1",
-    "@angular-eslint/eslint-plugin": "20.1.1",
-    "@angular-eslint/eslint-plugin-template": "20.1.1",
-    "@angular-eslint/schematics": "20.1.1",
-    "@angular-eslint/template-parser": "20.1.1",
+    "@angular-eslint/builder": "21.0.0",
+    "@angular-eslint/eslint-plugin": "21.0.0",
+    "@angular-eslint/eslint-plugin-template": "21.0.0",
+    "@angular-eslint/schematics": "21.0.0",
+    "@angular-eslint/template-parser": "21.0.0",
     "@angular/build": "^20.1.1",
     "@angular/cli": "^20.1.1",
     "@angular/compiler-cli": "^20.1.2",