Update MEC010-2_AppGrant.yaml

MEC010-2_AppGrant.yaml

@@ -633,9 +633,9 @@ components:
           description: Identifier of the connection to the VIM that manages the resource zone. The applicable "VimConnectionInfo" structure, which is referenced by vimConnectionId, can be obtained from the " vimConnectionInfo" attribute of the "AppInstanceInfo" structure.
         vimConnectionId: 
           type: string
-          description: 
+          description: ''
         zoneId:
           type: string
           description: The identifier of the resource zone, as managed by the resource management layer (typically, the VIM).
 security:
-- {}
\ No newline at end of file
+- {}