Fix typo in reroute (#4240)

(cherry picked from commit 2e5a4b5)

docs/en/observability/apm/ingest-pipelines.asciidoc

@@ -64,7 +64,7 @@ The process for creating a custom ingest pipeline is as follows:
 If you prefer more guidance, see one of these tutorials:
 
 * <<apm-filters-ingest-pipeline>> — Learn how to obfuscate passwords stored in the `http.request.body.original` field.
-* <<apm-data-stream-rerouting>> — Learn how rerouting APM data to user-defined APM data streams.
+* <<apm-data-stream-rerouting>> — Learn how to reroute APM data to user-defined APM data streams.
 * {fleet-guide}/data-streams-pipeline-tutorial.html[Transform data with custom ingest pipelines] — A basic Elastic integration tutorial where you learn how to add a custom field to incoming data.
 
 // end::ingest-pipelines[]