Add ESP32SyncKit repository link (#7435)

Added a new repository link for ESP32SyncKit.

Author: tanakamasayuki

repositories.txt

@@ -7142,6 +7142,7 @@ https://github.com/tanakamasayuki/EspHttpServer
 https://github.com/tanakamasayuki/ESP32AutoTask
 https://github.com/tanakamasayuki/ESP32TaskKit
 https://github.com/tanakamasayuki/EspNowBus
+https://github.com/tanakamasayuki/ESP32SyncKit
 https://github.com/TanPitch/ButtonKing
 https://github.com/TaraHoleInIt/Subpixie
 https://github.com/tasos12/ev3-arduino