Update maintenance configuration description to list supported values

Author: anushkasingh16

specification/containerservice/resource-manager/Microsoft.ContainerService/aks/preview/2025-10-02-preview/managedClusters.json

@@ -867,7 +867,7 @@
             "in": "path",
             "required": true,
             "type": "string",
-            "description": "The name of the maintenance configuration."
+            "description": "The name of the maintenance configuration. Supported values are 'default', 'aksManagedAutoUpgradeSchedule', or 'aksManagedNodeOSUpgradeSchedule'."
           }
         ],
         "responses": {
@@ -914,7 +914,7 @@
             "in": "path",
             "required": true,
             "type": "string",
-            "description": "The name of the maintenance configuration."
+            "description": "The name of the maintenance configuration. Supported values are 'default', 'aksManagedAutoUpgradeSchedule', or 'aksManagedNodeOSUpgradeSchedule'."
           },
           {
             "name": "parameters",
@@ -977,7 +977,7 @@
             "in": "path",
             "required": true,
             "type": "string",
-            "description": "The name of the maintenance configuration."
+            "description": "The name of the maintenance configuration. Supported values are 'default', 'aksManagedAutoUpgradeSchedule', or 'aksManagedNodeOSUpgradeSchedule'."
           }
         ],
         "responses": {