chore(deps): update typescript-eslint monorepo to v6.21.0

Author: renovate[bot]

package-lock.json

@@ -34,8 +34,8 @@
     "@types/jest": "29.5.11",
     "@types/node": "^20",
     "@types/supertest": "6.0.2",
-    "@typescript-eslint/eslint-plugin": "6.20.0",
-    "@typescript-eslint/parser": "6.20.0",
+    "@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-import": "2.29.1",