Update typescript-eslint monorepo to v6.21.0

Author: renovate[bot]

package-lock.json

@@ -35,8 +35,8 @@
     "@angular/compiler-cli": "^17.2.0",
     "@angular/localize": "^17.2.1",
     "@types/jasmine": "~5.1.0",
-    "@typescript-eslint/eslint-plugin": "6.19.0",
-    "@typescript-eslint/parser": "6.19.0",
+    "@typescript-eslint/eslint-plugin": "6.21.0",
+    "@typescript-eslint/parser": "6.21.0",
     "eslint": "^8.56.0",
     "eslint-config-prettier": "^9.1.0",
     "eslint-plugin-prettier": "^5.1.3",