update README.md

Author: zouri

README.md

@@ -267,7 +267,7 @@ bridge:
 
 As seen in the [Quick Start](#quick-start), the *mqtt_client* can not only exchange arbitrary ROS messages with other *mqtt_clients*, but it can also exchange primitive message data with other non-*mqtt_client* MQTT clients. This allows ROS-based devices to exchange primitive messages with devices not based on ROS. The `primitive` parameter can be set for both ROS-to-MQTT (`bridge/ros2mqtt`) and for MQTT-to-ROS (`bridge/mqtt2ros`) transmissions.
 
-If a ROS-to-MQTT transmission is configured as `primitive` and the ROS message type is one of the supported primitive ROS message types, the raw data is published as a string. The supported primitive ROS message types are [`std_msgs/String`](http://docs.ros.org/en/api/std_msgs/html/msg/String.html), [`std_msgs/Bool`](http://docs.ros.org/en/api/std_msgs/html/msg/Bool.html), [`std_msgs/Char`](http://docs.ros.org/en/api/std_msgs/html/msg/Char.html), [`std_msgs/UInt8`](http://docs.ros.org/en/api/std_msgs/html/msg/UInt8.html), [`std_msgs/UInt16`](http://docs.ros.org/en/api/std_msgs/html/msg/UInt16.html), [`std_msgs/UInt32`](http://docs.ros.org/en/api/std_msgs/html/msg/UInt32.html), [`std_msgs/UInt64`](http://docs.ros.org/en/api/std_msgs/html/msg/UInt64.html), [`std_msgs/Int8`](http://docs.ros.org/en/api/std_msgs/html/msg/Int8.html), [`std_msgs/Int16`](http://docs.ros.org/en/api/std_msgs/html/msg/Int16.html), [`std_msgs/Int32`](http://docs.ros.org/en/api/std_msgs/html/msg/Int32.html), [`std_msgs/Int64`](http://docs.ros.org/en/api/std_msgs/html/msg/Int64.html), [`std_msgs/Float32`](http://docs.ros.org/en/api/std_msgs/html/msg/Float32.html), [`std_msgs/Float64`](http://docs.ros.org/en/api/std_msgs/html/msg/Float64.html).
+If a ROS-to-MQTT transmission is configured as `primitive` and the ROS message type is one of the supported primitive ROS message types, the raw data is published as a string. The supported primitive ROS message types are [`std_msgs/String`](http://docs.ros.org/en/api/std_msgs/html/msg/String.html), [`std_msgs/Bool`](http://docs.ros.org/en/api/std_msgs/html/msg/Bool.html), [`std_msgs/Char`](http://docs.ros.org/en/api/std_msgs/html/msg/Char.html), [`std_msgs/UInt8`](http://docs.ros.org/en/api/std_msgs/html/msg/UInt8.html), [`std_msgs/UInt16`](http://docs.ros.org/en/api/std_msgs/html/msg/UInt16.html), [`std_msgs/UInt32`](http://docs.ros.org/en/api/std_msgs/html/msg/UInt32.html), [`std_msgs/UInt64`](http://docs.ros.org/en/api/std_msgs/html/msg/UInt64.html), [`std_msgs/Int8`](http://docs.ros.org/en/api/std_msgs/html/msg/Int8.html), [`std_msgs/Int16`](http://docs.ros.org/en/api/std_msgs/html/msg/Int16.html), [`std_msgs/Int32`](http://docs.ros.org/en/api/std_msgs/html/msg/Int32.html), [`std_msgs/Int64`](http://docs.ros.org/en/api/std_msgs/html/msg/Int64.html), [`std_msgs/Float32`](http://docs.ros.org/en/api/std_msgs/html/msg/Float32.html), [`std_msgs/Float64`](http://docs.ros.org/en/api/std_msgs/html/msg/Float64.html), [`std_msgs/UInt8MultiArray`](http://docs.ros.org/en/api/std_msgs/html/msg/UInt8MultiArray.html).
 
 If an MQTT-to-ROS transmission is configured as `primitive`, the MQTT message is interpreted and published as a primitive data type, if possible. The message is probed in the following order: `bool` ([`std_msgs/Bool`](http://docs.ros.org/en/api/std_msgs/html/msg/Bool.html)), `int` ([`std_msgs/Int32`](http://docs.ros.org/en/api/std_msgs/html/msg/Int32.html)), `float` ([`std_msgs/Float32`](http://docs.ros.org/en/api/std_msgs/html/msg/Float32.html)), `string` ([`std_msgs/String`](http://docs.ros.org/en/api/std_msgs/html/msg/String.html)).