modify the message hint

Signed-off-by: Xianhui.Lin <[email protected]>

internal/proxy/util.go

@@ -365,7 +365,7 @@ func validateMaxLengthPerRow(collectionName string, field *schemapb.FieldSchema)
 			return err
 		}
 		if maxLengthPerRow <= 0 {
-			return merr.WrapErrParameterInvalidMsg("the maximum length specified for a VarChar should be in (0, 65535]")
+			return merr.WrapErrParameterInvalidMsg("the maximum length specified for a VarChar should be greater than 0")
 		}
 		exist = true
 	}