Revise non-extendable regions for Managed HSM

Updated the list of non-extendable regions for Managed HSM.

Author: chen-karen

articles/key-vault/managed-hsm/multi-region-replication.md

@@ -54,7 +54,7 @@ If a region reports an unhealthy status to the Traffic Manager, future requests
 All Azure Managed HSM regions are supported as primary regions (regions where you can replicate a Managed HSM pool from).
 
 > [!NOTE]
-> US East, West Europe, Qatar Central, Poland Central, and West India cannot be extended regions at this time. Other regions may be unavailable for extension due to capacity limitations in the region.
+> US East, Canada East, West Europe, Qatar Central, Poland Central, and West India cannot be extended regions at this time. Other regions may be unavailable for extension due to capacity limitations in the region.
 
 ## Billing