new systeVM template is required for even 4.11.3 (apache#76)

* new systeVM template is required for even 4.11.3

s

* fix

* fix2

Author: andrijapanicsb

source/upgrading/upgrade/upgrade-4.11.rst

@@ -53,6 +53,11 @@ Overview of Upgrade Steps:
     If you are not already using the |sysvm64-version| System VM template you will need to 
     upgrade your System VM template prior to performing the upgrade of the 
     CloudStack packages.
+    
+.. warning::
+    Even if you are currently running a **clean** install of CloudStack 4.11.3, you will need to explicitely register the 
+    |sysvm64-version| System VM template. If you are running CloudStack 4.11.3 that was upgraded from some of the previous versions,
+    you don't need to register a new |sysvm64-version| System VM template.
 
 .. include:: _sysvm_templates.rst