OCPBUGS-7083: Updated Prism Central link

Author: dfitzmau

modules/nutanix-entitlements.adoc

@@ -5,4 +5,5 @@
 [id="nutanix-entitlements_{context}"]
 = Internet access for Prism Central
 
-Prism Central requires internet access to obtain the {op-system-first} image that is required to install the cluster. The {op-system} image for Nutanix is available at `rhcosredirector.apps.art.xq1c.p1.openshiftapps.com`.
+Prism Central requires internet access to obtain the {op-system-first} image that is required to install the cluster. The {op-system} image for Nutanix is available at `rhcos.mirror.openshift.com`.
+