missing doc for java bulk ingester (#5706) (#5711)

(cherry picked from commit 276f92f)

Co-authored-by: Laura Trotta <[email protected]>

Author: github-actions[bot]

specification/_global/bulk/BulkRequest.ts

@@ -94,6 +94,7 @@ import { OperationContainer, UpdateAction } from './types'
  * * Perl: Check out `Search::Elasticsearch::Client::5_0::Bulk` and `Search::Elasticsearch::Client::5_0::Scroll`
  * * Python: Check out `elasticsearch.helpers.*`
  * * JavaScript: Check out `client.helpers.*`
+ * * Java: Check out `co.elastic.clients.elasticsearch._helpers.bulk.BulkIngester`
  * * .NET: Check out `BulkAllObservable`
  * * PHP: Check out bulk indexing.
  * * Ruby: Check out `Elasticsearch::Helpers::BulkHelper`