Added the Serial Packets library to the Arduino library list. (#2899)

Author: zapta

repositories.txt

@@ -5895,4 +5895,5 @@ https://github.com/deneyapkart/deneyap-servo-arduino-library
 https://github.com/hmz06967/SPI-FlashMem
 https://github.com/hmz06967/OZGPS_NMEA
 https://github.com/pazi88/STM32_CAN
+https://github.com/zapta/serial_packets_arduino
 https://github.com/dang-gun/Arduino_ButtonClickCheck