Update doc and help command to reflect cluster name needs to be unique

docs/setup-instructions.md

@@ -9,7 +9,7 @@
 bash main.sh -h
 
 # Example command
-# Note: Cluster name (-c) must be globally unique
+# Note: Cluster name (-c) must be unique
 bash main.sh -a msal-test -c cluster-test -r easy-auth -e email@microsoft.com -d microsoft.com -l eastus
 ```
 

main.sh

@@ -83,7 +83,7 @@ do
             # Change to how others show it like az
             echo "HELP: Here are the flags and their variables"
 			echo "REQUIRED: -a is for AD_APP_NAME"
-            echo "REQUIRED: -c is for CLUSTER_NAME *Note: Cluster Name must be globally unique*" 
+            echo "REQUIRED: -c is for CLUSTER_NAME *Note: Cluster Name must be unique*" 
             echo "REQUIRED: -r is for CLUSTER_RG"
             echo "REQUIRED: -e is for EMAIL"
             echo "REQUIRED: -d is for EMAIL_DOMAIN"