Update ref

content/en/hosting/4.x/upgrade-troubleshooting.md

@@ -7,7 +7,7 @@ aliases:
 description: >
   What to do when CHT 4.x upgrades don't work as planned
 relatedContent: >
-  hosting/4.x/data-migration
+  hosting/4.x/migration/migration-to-4x-docker
 ---
 
 4.0.0 was released in November of 2022 so 4.x is mature and users have learned a number of important lessons on how to fix failed 4.x upgrades.  Below are some specific tips as well as general practices on upgrading 4.x.