Update permissions.md to correct "ARC" -> "Arc"

Author: memildin

articles/defender-for-cloud/permissions.md

@@ -43,7 +43,7 @@ To allow the Security Admin role to automatically provision agents and extension
 | Service Principal | Roles |
 |:-|:-|
 | Defender for Containers provisioning AKS Security Profile | • Kubernetes Extension Contributor<br>• Contributor<br>• Azure Kubernetes Service Contributor<br>• Log Analytics Contributor |
-| Defender for Containers provisioning ARC K8s Enabled | • Azure Kubernetes Service Contributor<br>• Kubernetes Extension Contributor<br>• Contributor<br>• Log Analytics Contributor |
+| Defender for Containers provisioning Arc-enabled Kubernetes | • Azure Kubernetes Service Contributor<br>• Kubernetes Extension Contributor<br>• Contributor<br>• Log Analytics Contributor |
 | Defender for Containers provisioning Azure Policy Addon for Kubernetes | • Kubernetes Extension Contributor<br>• Contributor<br>• Azure Kubernetes Service Contributor |
 | Defender for Containers provisioning Policy extension for Arc-enabled Kubernetes | • Azure Kubernetes Service Contributor<br>• Kubernetes Extension Contributor<br>• Contributor |