[DOCS] Reword tip in data streams overview

docs/reference/data-streams/data-streams-overview.asciidoc

@@ -140,7 +140,7 @@ following requests to the backing index containing the document:
 
 See <<update-delete-docs-in-a-data-stream>>.
 
-TIP: If you need to frequently update or delete existing documents across
-multiple indices, we recommend using an <<indices-add-alias,index alias>> and
+TIP: If you frequently update or delete existing documents,
+we recommend using an <<indices-add-alias,index alias>> and
 <<indices-templates,index template>> instead of a data stream. You can still
-use <<index-lifecycle-management,{ilm-init}>> to manage the indices.
+use <<index-lifecycle-management,{ilm-init}>> to manage indices for the alias.