fix style

Author: reneeli@microsoft.com

src/aks-preview/azext_aks_preview/managed_cluster_decorator.py

@@ -2867,6 +2867,7 @@ def get_migrate_vmas_to_vms(self) -> bool:
         """
         return self.raw_param.get("migrate_vmas_to_vms")
 
+
 # pylint: disable=too-many-public-methods
 class AKSPreviewManagedClusterCreateDecorator(AKSManagedClusterCreateDecorator):
     def __init__(