Update repositories.txt (#5562)

Author: krosDC

repositories.txt

@@ -5,6 +5,7 @@ https://github.com/DigitalCodesign/MentorBit-BMP280
 https://github.com/DigitalCodesign/MentorBit-DetectorIR
 https://github.com/DigitalCodesign/MentorBit-DetectorLluvia
 https://github.com/DigitalCodesign/MentorBit-DHT11
+https://github.com/DigitalCodesign/MentorBit-DHT22
 https://github.com/median-dispersion/Non-Blocking-Melody
 https://github.com/jobitjoseph/ESPWebFileManager
 https://github.com/playfultechnology/PN5180