Update repositories.txt (arduino#2852)

add arduino-tencent-cloud-iot-sdk

Author: leonlucc

repositories.txt

@@ -5835,6 +5835,7 @@ https://github.com/avalonbits/vdp-gl
 https://github.com/obdevel/ACAN2040
 https://github.com/obdevel/CBUSACAN2040
 https://github.com/leonlucc/WZ
+https://github.com/leonlucc/arduino-tencent-cloud-iot-sdk
 https://github.com/CamelCaseName/HUB75Enano
 https://github.com/CamelCaseName/HUB75nano
 https://gitlab.com/riscv-vega/vega-sensor-libraries/communication/vega_irremote