Update repositories.txt

Adding RAk12033 WisBlock module library

Author: beegee-tokyo

repositories.txt

@@ -3179,6 +3179,7 @@ https://github.com/RAKWireless/RAK12025-I3G4250D
 https://github.com/RAKWireless/RAK12029-LDC1614
 https://github.com/RAKWireless/RAK13800-W5100S
 https://github.com/RAKWireless/RAK12034-BMX160
+https://github.com/RAKWireless/RAK12033-IIM42652
 https://github.com/ramonheras/Pixel-and-Play-Arduino-Library
 https://github.com/rapifireio/rapifire-arduino-mqtt
 https://github.com/sdutek/sducar