Update server.adoc (#855)

Author: supritha-kumar

home/modules/ROOT/pages/server.adoc

@@ -49,10 +49,10 @@ xref:server:getting-started:start-here.adoc[Get Started]
 
 [.column]
 ====== {empty}
-.Upgrading to v7.x
+.Upgrading to v8.x
 
 [.content]
-If you are an existing Couchbase user looking for information to upgrade to Couchbase Server 7.x and use collections and scopes, see xref:server:install:migrating-application-data.adoc[Upgrade and migrate your data to v7.x].
+If you are an existing Couchbase user looking for information to upgrade to Couchbase Server 8.x and use collections and scopes, see xref:server:install:migrating-application-data.adoc[Upgrade and migrate your data to v8.x].
 
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 ====== {empty}
@@ -200,7 +200,7 @@ Explore Couchbase https://developer.couchbase.com/tutorials/[Tutorials] to learn
 * xref:server:install:install-uninstalling.adoc[Uninstall]
 
 [.column]
-.Migrating to v7.x
+.Migrating to v8.x
 * xref:server:install:migrating-application-data.adoc[Migrating to a collection-based data model]
 * https://blog.couchbase.com/moving-from-sql-server-to-couchbase-part-1-data-modeling/[Migrating to Couchbase]