Update "_doc" to "account" type for bulk example (#28786)

* Change 'account' to '_doc' as types are deprecated

docs/reference/getting-started.asciidoc

@@ -669,7 +669,7 @@ You can download the sample dataset (accounts.json) from https://github.com/elas
 
 [source,sh]
 --------------------------------------------------
-curl -H "Content-Type: application/json" -XPOST "localhost:9200/bank/account/_bulk?pretty&refresh" --data-binary "@accounts.json"
+curl -H "Content-Type: application/json" -XPOST "localhost:9200/bank/_doc/_bulk?pretty&refresh" --data-binary "@accounts.json"
 curl "localhost:9200/_cat/indices?v"
 --------------------------------------------------
 // NOTCONSOLE