Add Adafruit STHS34PF80 repository link (#6831)

https://github.com/adafruit/Adafruit_STHS34PF80

Author: ladyada

repositories.txt

@@ -807,6 +807,7 @@ 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_STHS34PF80
 https://github.com/adafruit/Adafruit_STMPE610
 https://github.com/adafruit/Adafruit_STSPIN
 https://github.com/adafruit/Adafruit_TCA8418