adding url : https://github.com/YFROBOT-TM/Yfrobot-TTS-Library (#4634)

* Update repositories.txt

* Update repositories.txt

Author: YFROBOTZL

repositories.txt

@@ -6698,6 +6698,7 @@ https://github.com/YFROBOT-TM/Yfrobot-FPM383-Library
 https://github.com/YFROBOT-TM/Yfrobot-I2C-LineFollowSensor-Library
 https://github.com/YFROBOT-TM/Yfrobot-Motor-Driver-Library
 https://github.com/YFROBOT-TM/Yfrobot-Valon3-Library
+https://github.com/YFROBOT-TM/Yfrobot-TTS-Library
 https://github.com/yhur/ConfigPortal32
 https://github.com/yhur/ConfigPortal8266
 https://github.com/YiannisBourkelis/Uptime-Library