Package repository version name is not matched with release version on OCPv4.6.

Released OCP version is v4.6, but the package repository "rhel-7-server-ose-4.5-rpms" has not matched version in the name.

Author: bysnupy

modules/rhel-preparing-playbook-machine.adoc

@@ -75,7 +75,7 @@ a pool with an `OpenShift` subscription to it:
     --enable="rhel-7-server-rpms" \
     --enable="rhel-7-server-extras-rpms" \
     --enable="rhel-7-server-ansible-2.9-rpms" \
-    --enable="rhel-7-server-ose-4.5-rpms"
+    --enable="rhel-7-server-ose-4.6-rpms"
 ----
 
 . Install the required packages, including `openshift-ansible`: