re-add utils dependency in backend-client

Author: alexnuttall

lambdas/backend-client/package.json

@@ -19,6 +19,7 @@
     "@hey-api/openapi-ts": "^0.64.13",
     "axios": "^1.8.4",
     "axios-retry": "^4.5.0",
+    "nhs-notify-web-template-management-utils": "^0.0.1",
     "zod": "^3.24.2"
   },
   "devDependencies": {