message: allow any string, even empty (unset) as status page ID
diff: @@ -383,7 +383,7 @@ export const updateBillingGroup: ResolverFn = async (
  ...attributes,
  type: ['billing'],
  ...(currency ? { currency: [currency] } : {}),
  - ...(uptimeRobotStatusPageId ? {uptimeRobotStatusPageId: [uptimeRobotStatusPageId] }: {}),
  + ...(R.is(String, uptimeRobotStatusPageId) ? {uptimeRobotStatusPageId: [uptimeRobotStatusPageId] }: {}),
  ...(billingSoftware ? { billingSoftware: [billingSoftware] } : {}),
  };
  