[Profiling] Improve wording in upgrade docs (#3184)

With this commit we apply a suggestion made in #3179 and improve the rendering of a related console snippet.

Co-authored-by: Mike Birnstiehl 114418652+mdbirnstiehl@users.noreply.github.com
(cherry picked from commit 17dba9f)

docs/en/observability/profiling-upgrade.asciidoc

@@ -54,9 +54,9 @@ NOTE: When stopping incoming requests, host-agent replicas back off and retry co
 
 You can delete existing profiling data in Kibana:
 
-. If you are upgrading from 8.9.0 or higher, from the navigation menu, go to *Dev Tools*, paste the following snippet and execute it. If you are upgrading from an earlier version you can skip this step.
+. If you're upgrading from 8.9.0 or later, go to *Dev Tools* from the navigation menu, and execute the following snippet. If you're upgrading from an earlier version, skip this step.
 +
-[source]
+[source,console]
 ----
 PUT /_cluster/settings
 {