Add Adafruit_STCC4 repository link (#7398)

https://github.com/adafruit/Adafruit_STCC4

Author: ladyada

repositories.txt

@@ -950,6 +950,7 @@ https://github.com/adafruit/Adafruit_SSD1305
 https://github.com/adafruit/Adafruit_SSD1306
 https://github.com/adafruit/Adafruit_SSD1325_Library
 https://github.com/adafruit/Adafruit_SSD1327
+https://github.com/adafruit/Adafruit_STCC4
 https://github.com/adafruit/Adafruit_STHS34PF80
 https://github.com/adafruit/Adafruit_STMPE610
 https://github.com/adafruit/Adafruit_STSPIN