Update repositories.txt (#4498)

Author: pnhung177

repositories.txt

@@ -4724,6 +4724,7 @@ https://github.com/pxsty0/deneyap.telegram
 https://github.com/pxsty0/deneyapkart.agent.lib
 https://github.com/pxsty0/pxserv.lib
 https://github.com/Pylo/MCreatorLinkArduino
+https://github.com/pokerobo/Pokerobo_Arm
 https://github.com/pokerobo/Pokerobo_Car
 https://github.com/pokerobo/Pokerobo_Labs
 https://github.com/pokerobo/Pokerobo_RCB