Fix typo in parameter description

Author: Anurag Awasthi

api/src/main/java/org/apache/cloudstack/api/command/admin/zone/UpdateZoneCmd.java

@@ -95,7 +95,7 @@ public class UpdateZoneCmd extends BaseCmd {
     @Parameter(name = ApiConstants.LOCAL_STORAGE_ENABLED, type = CommandType.BOOLEAN, description = "true if local storage offering enabled, false otherwise")
     private Boolean localStorageEnabled;
 
-    @Parameter(name = ApiConstants.SORT_KEY, type = CommandType.INTEGER, description = "sort key of the disk offering, integer")
+    @Parameter(name = ApiConstants.SORT_KEY, type = CommandType.INTEGER, description = "sort key of the zone, integer")
     private Integer sortKey;
 
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