Autogenerate schemas

Author: Autogenerator Pipeline

schemas/2021-01-11/Microsoft.HealthcareApis.json

@@ -626,7 +626,7 @@
         "lastModifiedAt": {
           "type": "string",
           "format": "date-time",
-          "description": "The type of identity that last modified the resource."
+          "description": "The timestamp of resource last modification (UTC)"
         },
         "lastModifiedBy": {
           "type": "string",