Update azure-arc-enable-cluster.md

Change clusterName description.

Author: Greedygre

articles/container-apps/azure-arc-enable-cluster.md

@@ -333,7 +333,7 @@ A [Log Analytics workspace](../azure-monitor/logs/quick-create-workspace.md) pro
     | - | - |
     | `Microsoft.CustomLocation.ServiceAccount` | The service account created for the custom location. It's recommended that it 's set to the value `default`. |
     | `appsNamespace` | The namespace used to create the app definitions and revisions. It **must** match that of the extension release namespace. |
-    | `CLUSTER_NAME` | The name of the Container Apps extension Kubernetes environment that will be created against this extension. |
+    | `clusterName` | The name of the Container Apps extension Kubernetes environment that will be created against this extension. |
     | `logProcessor.appLogs.destination` | Optional. Destination for application logs. Accepts `log-analytics` or `none`, choosing none disables platform logs. |
     | `logProcessor.appLogs.logAnalyticsConfig.customerId` | Required only when `logProcessor.appLogs.destination` is set to `log-analytics`. The base64-encoded Log analytics workspace ID. This parameter should be configured as a protected setting. |
     | `logProcessor.appLogs.logAnalyticsConfig.sharedKey` | Required only when `logProcessor.appLogs.destination` is set to `log-analytics`. The base64-encoded Log analytics workspace shared key. This parameter should be configured as a protected setting. |4