CCM-9692: fix missing package json dependency

Author: alexnuttall

package-lock.json

@@ -20,6 +20,7 @@
     "eslint-plugin-playwright": "^2.2.0",
     "generate-password": "^1.7.1",
     "nhs-notify-backend-client": "^0.0.1",
+    "nhs-notify-web-template-management-util-backend-config": "^0.0.1",
     "nhs-notify-web-template-management-utils": "^0.0.1",
     "pa11y": "^8.0.0",
     "tsx": "^4.19.3"