Update repositories.txt

add DFROBOT_CT1780 & DFROBOT_TM6605

Author: fary99

repositories.txt

@@ -2405,6 +2405,8 @@ https://github.com/DFRobot/DFRobot_VoiceRecorder
 https://github.com/DFRobot/DFRobotDFPlayerMini
 https://github.com/DFRobot/DFRobotIRPosition
 https://github.com/DFRobot/DFRobot_MHZ9041A
+https://github.com/DFRobot/DFRobot_CT1780
+https://github.com/DFRobot/DFRobot_TM6605
 https://github.com/dgduncan/Arduino-MCP4131
 https://github.com/dgduncan/SevenSegment
 https://github.com/Dhanabhon/TomIBT2