[Feedback]: _prefer_nodes and _shards in preference description should be separated visually

[zuozp8]

Was the documentation helpful?

Yes

What documentation page is affected

https://www.elastic.co/docs/api/doc/elasticsearch/operation/operation-search and all other endpoints with preference field

Description

Highlighted fragment should be a separate item on the list, text after the highlighted fragment should also be a separate item on the list