Change the PostgreSQL 12 mount point (#313)

* Chaneg the PostgreSQL 12 mount point

Bug 1896703 - Change directory to "/var/opt/rh/rh-postgresql12/" in Storage Requirements section to avoid warning during upgrade

https://bugzilla.redhat.com/show_bug.cgi?id=1896703

* Remove old remaining line

guides/common/modules/ref_satellite-storage-requirements.adoc

@@ -27,7 +27,7 @@ ifdef::installing-satellite-server-disconnected[30 GB]
 
 |/var/log/ |10 MB |10 GB
 
-|/var/opt/rh/rh-postgresql12/lib/pgsql/ |100 MB |10 GB
+|/var/opt/rh/rh-postgresql12 |100 MB |10 GB
 
 |/var/spool/squid/ |0 MB |10 GB