Update repositories.txt (#5245)

Author: Tinyu-Zhao

repositories.txt

@@ -3784,6 +3784,7 @@ https://github.com/m5stack/M5-LoRa-E220-JP
 https://github.com/m5stack/M5-LoRaWAN
 https://github.com/m5stack/M5-RoverC
 https://github.com/m5stack/M5-STHS34PF80
+https://github.com/m5stack/M5Utility
 https://github.com/m5stack/M5Atom
 https://github.com/m5stack/M5AtomS3
 https://github.com/m5stack/M5BurnerNVS