Update library.properties

Author: 256dpi

library.properties

@@ -2,7 +2,7 @@ name=MQTT
 version=1.4.0
 author=Joel Gaehwiler <joel.gaehwiler@gmail.com>
 maintainer=Joel Gaehwiler <joel.gaehwiler@gmail.com>
-sentence=MQTT library for arduino based on the Eclipse Paho projects.
+sentence=MQTT library for Arduino based on the Eclipse Paho projects.
 paragraph=This library bundles the Embedded MQTT C/C++ Client library of the Eclipse Paho project and adds a thin wrapper to get an Arduino like API. Additionally there is an drop-in alternative for the Arduino Yùn that uses a python based client on the linux processor and a binary interface to lower program space usage on the Arduino side.
 url=https://github.com/256dpi/arduino-mqtt
 architectures=*