Doc-24 Minor clarification about cluster versions in migration doc (#901)

Co-authored-by: Paulo Borges <[email protected]>

Author: Feediver1

modules/upgrade/pages/migrate/data-migration.adoc

@@ -14,7 +14,7 @@ See the https://kafka.apache.org/downloads[Kafka downloads page^] for download i
 
 To set up the replication, you need:
 
-* 2 Redpanda clusters - You can set up these clusters in any deployment you like, including xref:deploy:deployment-option/self-hosted/kubernetes/get-started-dev.adoc[Kubernetes], xref:get-started:quick-start.adoc[Docker], and xref:deploy:deployment-option/self-hosted/manual/index.adoc[Linux].
+* 2 Redpanda clusters - Redpanda's migration mechanism is independent of the underlying cluster version or cluster platform, so you can set up these clusters in any deployment you like, including xref:deploy:deployment-option/self-hosted/kubernetes/get-started-dev.adoc[Kubernetes], and xref:deploy:deployment-option/self-hosted/manual/index.adoc[Linux].
 * MirrorMaker 2 host - You install MirrorMaker 2 on a separate system or on one of the Redpanda clusters, as long as the IP addresses and ports on each cluster are accessible from the MirrorMaker 2 host.
 You must install the https://docs.oracle.com/javase/10/install/toc.htm[Java Runtime Engine (JRE)^] on the MirrorMaker 2 host.