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

Author: renovate[bot]

package.json

@@ -67,11 +67,11 @@
     "@angular-devkit/build-angular": "^19.2.15",
     "@angular-devkit/core": "^19.2.15",
     "@angular-devkit/schematics": "^19.2.15",
-    "@angular-eslint/builder": "19.3.0",
-    "@angular-eslint/eslint-plugin": "19.3.0",
-    "@angular-eslint/eslint-plugin-template": "19.3.0",
-    "@angular-eslint/schematics": "19.3.0",
-    "@angular-eslint/template-parser": "19.3.0",
+    "@angular-eslint/builder": "21.1.0",
+    "@angular-eslint/eslint-plugin": "21.1.0",
+    "@angular-eslint/eslint-plugin-template": "21.1.0",
+    "@angular-eslint/schematics": "21.1.0",
+    "@angular-eslint/template-parser": "21.1.0",
     "@angular/cli": "^19.2.16",
     "@angular/compiler-cli": "^19.2.15",
     "@schematics/angular": "^19.2.15",