[style] - Update code styling

Author: william051200

src/azure-cli/azure/cli/command_modules/vm/_vm_utils.py

@@ -839,4 +839,4 @@ class IdentityType(Enum):
     SYSTEM_ASSIGNED = 'SystemAssigned'
     USER_ASSIGNED = 'UserAssigned'
     SYSTEM_ASSIGNED_USER_ASSIGNED = 'SystemAssigned, UserAssigned'
-    NONE = 'None'
+    NONE = 'None'