Update keyvault-movesubscription.md

updating azure CLI command

Author: ShaneBala-keyvault

articles/key-vault/general/keyvault-movesubscription.md

@@ -82,7 +82,7 @@ Set-AzResource -ResourceId $vaultResourceId -Properties $vault.Properties  # Mod
 
 ```azurecli
 az account set -s <your-subscriptionId>                                    # Select your Azure Subscription
-tenantId=$(az account show --query tenantId)                               # Get your tenantId
+set tenantId=$(az account show --query tenantId)                           # Get your tenantId
 az keyvault update -n myvault --remove Properties.accessPolicies           # Remove the access policies
 az keyvault update -n myvault --set Properties.tenantId=$tenantId          # Update the key vault tenantId
 ```