Add submission # 2609

#2609

Author: ArduinoBot

registry.txt

@@ -5782,3 +5782,4 @@ https://github.com/Teknikio/Teknikio_Bluebird_Arduino.git|Contributed|Bluebird
 https://github.com/DFRobot/DFRobot_DF2301Q.git|Contributed|DFRobot_DF2301Q
 https://github.com/Nickjgniklu/ESPMagicHome.git|Contributed|MagicHome
 https://github.com/NanitRobot/NanitLib.git|Contributed|NanitLib
+https://github.com/RobTillaart/SHT31_SW.git|Contributed|SHT31_SW