Update library.properties

Author: khoih-prog

library.properties

@@ -6,6 +6,6 @@ license=MIT
 maintainer=Khoi Hoang <khoih58@gmail.com>
 sentence=This library enables you to use Interrupt from Hardware Timers on an Arduino, such as Nano, UNO, Mega, etc.
 paragraph=It now supports 16 ISR-based timers, while consuming only 1 hardware Timer. Timers' interval is very long (ulong millisecs). The most important feature is they're ISR-based timers. Therefore, their executions are not blocked by bad-behaving functions or tasks. This important feature is absolutely necessary for mission-critical tasks.
-category=Timing
+category=Timing Control Device Time Timer Interrupt avr teensy
 url=https://github.com/khoih-prog/TimerInterrupt
 architectures=avr,teensy