Update repositories.txt (#6636)

Adding MabuTrace library

Author: mabuware

repositories.txt

@@ -4204,6 +4204,7 @@ https://github.com/m5stack/M5Module-LLM
 https://github.com/m5stack/M5Module-Audio
 https://github.com/m5stack/M5StamPLC
 https://github.com/m5stack/M5-LoRaWAN-RAK
+https://github.com/mabuware/MabuTrace
 https://github.com/machinefi/psa-crypto-arduino
 https://github.com/machinefi/w3bstream-client-arduino-ce
 https://github.com/MacroYau/LTC2942-Arduino-Library