M5Chain (#7264)

Author: TinyuZhao

repositories.txt

@@ -151,6 +151,7 @@ https://github.com/DigitalCodesign/MentorBit-SGP30
 https://github.com/Matthew-a-smith/OpenEdgeStack
 https://github.com/jmwanderer/RYLR_LoRaAT
 https://github.com/LFranklinApps/Custom_Robot_Control
+https://github.com/m5stack/M5Chain
 https://github.com/X-croot/XCR-LDR
 https://github.com/scalpelspace/scalpelspace_momentum
 https://github.com/X-croot/TB6612FNG_XCR