message: docs/api: fix link in utility APIs
diff: @@ -160,7 +160,8 @@ const app = createApp({
  ```
  A common pattern is to export a list of all APIs from `apis.ts`, next to
  -`App.tsx`. See the [example app in this repo](../../packages/app/src/apis.ts)
  +`App.tsx`. See the
  +[example app in this repo](https://github.com/backstage/backstage/blob/master/packages/app/src/apis.ts)
  for an example.
  ## Custom implementations of Utility APIs
  