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

Author: renovate[bot]

package.json

@@ -88,11 +88,11 @@
   "devDependencies": {
     "@angular-devkit/build-angular": "12.2.18",
     "@angular-devkit/core": "12.2.18",
-    "@angular-eslint/builder": "12.7.0",
-    "@angular-eslint/eslint-plugin": "12.7.0",
-    "@angular-eslint/eslint-plugin-template": "12.7.0",
-    "@angular-eslint/schematics": "12.7.0",
-    "@angular-eslint/template-parser": "12.7.0",
+    "@angular-eslint/builder": "21.0.1",
+    "@angular-eslint/eslint-plugin": "21.0.1",
+    "@angular-eslint/eslint-plugin-template": "21.0.1",
+    "@angular-eslint/schematics": "21.0.1",
+    "@angular-eslint/template-parser": "21.0.1",
     "@angular/cli": "12.2.18",
     "@angular/compiler-cli": "12.2.17",
     "@angular/language-service": "12.2.17",