message: docs(migration): update link to RxJS migration guide
diff: @@ -131,7 +131,7 @@ See the following `ionic.config.json` as an example:
  ## RxJS Changes
  -Between V3 and V4, RxJS was updated to version 6. This changes many of the import paths of operators and core RxJS functions. Please see the <a href="https://github.com/ReactiveX/rxjs/blob/master/MIGRATION.md" target="_blank">RxJS Migration Guide</a> for details.
  +Between V3 and V4, RxJS was updated to version 6. This changes many of the import paths of operators and core RxJS functions. Please see the <a href="https://github.com/ReactiveX/rxjs/blob/master/docs_app/content/guide/v6/migration.md" target="_blank">RxJS Migration Guide</a> for details.
  ## Lifecycle Events
  