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

Author: renovate[bot]

package.json

@@ -42,11 +42,11 @@
     "tslib": "^2.8.1"
   },
   "devDependencies": {
-    "@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",