Replace "high-latency" with "low latency"

High-latency isn't likely to be the desired product of optimization 🐢

Author: matthewwhipple

content/microservices/mqtt.md

@@ -1,6 +1,6 @@
 ### MQTT
 
-[MQTT](https://mqtt.org/) (Message Queuing Telemetry Transport) is an open source, lightweight messaging protocol, optimized for high-latency. This protocol provides a scalable and cost-efficient way to connect devices using a **publish/subscribe** model. A communication system built on MQTT consists of the publishing server, a broker and one or more clients. It is designed for constrained devices and low-bandwidth, high-latency or unreliable networks.
+[MQTT](https://mqtt.org/) (Message Queuing Telemetry Transport) is an open source, lightweight messaging protocol, optimized for low latency. This protocol provides a scalable and cost-efficient way to connect devices using a **publish/subscribe** model. A communication system built on MQTT consists of the publishing server, a broker and one or more clients. It is designed for constrained devices and low-bandwidth, high-latency or unreliable networks.
 
 #### Installation