message: docs: add xrefs to update app and deprecations policy
  PR Close
diff: This guide contains everything you need to know about updating to the next Angular version.
  +<div class="alert is-helpful">
  +
  +For step-by-step instructions on how to update to the latest Angular release, use the interactive update guide at [update.angular.io](https://update.angular.io).
  +
  +</div>
  +
  ## Updating CLI Apps
  If your application uses the CLI, you can update to version 9 automatically with the help of the `ng update` script:
  @@ -24,6 +30,12 @@ If you're curious about the specific migrations being run, see the [automated mi
  ## Changes and Deprecations in Version 9
  +<div class="alert is-helpful">
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  + For information about Angular's deprecation and removal practices, see [Angular Release Practices](guide/releases#deprecation-practices "Angular Release Practices: Deprecation practices").
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  +</div>
  +
  {@a breaking-changes}
  ### New Breaking Changes
  