Doc: Clarify installation order recommendation (#221)

* Doc: Clarify installation order recommendation

* Fix typo

Author: karenzone

docs/index.asciidoc

@@ -54,7 +54,7 @@ Events that _fail_ ingest pipeline processing will be tagged with `_ingest_pipel
 - When you upgrade the {stack}, upgrade {ls} (or this plugin specifically) _before_ you upgrade {kib}.
   (Note that this requirement is a departure from the typical {stack} https://www.elastic.co/guide/en/elastic-stack/current/installing-elastic-stack.html#install-order-elastic-stack[installation order].) 
 +
-The {es}-{ls}-{kib} installation order ensures the best experience with {agent}-managed pipelines, and embeds functionality from a version of {es} Ingest Node that is compatible with the plugin version (`major`.`minor`).   
+The {es}-{ls}-{kib} installation order recommended here ensures the best experience with {agent}-managed pipelines, and embeds functionality from a version of {es} Ingest Node that is compatible with the plugin version (`major`.`minor`).   
 
 [id="plugins-{type}s-{plugin}-es-tips"]
 ===== Using `filter-elastic_integration` with `output-elasticsearch`