Update 5.x-patch.md

doc/5.x-patch.md

@@ -121,7 +121,9 @@ git push origin master
 
 ## 7: Make new versions visible on download sites
 
-Log into https://civicrm.org/user and clear the page-cache in https://civicrm.org/admin/config/development/performance
+Log into ~~https://civicrm.org/user~~ https://d8.civicrm.org/user and clear the page-cache in ~~https://civicrm.org/admin/config/development/performance~~ in https://d8.civicrm.org/admin/config/development/performance
+
+<!-- civicrm.org is in a migration from D7=>D8. These details may be in flux until that settles. -->
 
 Browse https://sourceforge.net/projects/civicrm/files/civicrm-stable - confirm that: