Update repositories.txt (#3183)

Author: bonezegei

repositories.txt

@@ -6051,6 +6051,7 @@ https://github.com/bonezegei/Bonezegei_ILI9341v2
 https://github.com/bonezegei/Bonezegei_XPT2046v2
 https://github.com/bonezegei/Bonezegei_GL
 https://github.com/bonezegei/Bonezegei_HCSR04
+https://github.com/bonezegei/Bonezegei_GSM
 https://gitlab.com/riscv-vega/vega-sensor-libraries/communication/vegaiot_busio
 https://gitlab.com/riscv-vega/vega-sensor-libraries/sensors/vega_bmi088
 https://github.com/odriverobotics/ODriveArduino