Update repositories.txt (#5523)

Author: goldfish4tech

repositories.txt

@@ -2578,6 +2578,7 @@ https://github.com/GOB52/gob_unifiedButton
 https://github.com/gobbolab/room-weather
 https://github.com/Goji2100/ESP32softPWM
 https://github.com/goldfish4tech/Goldfish4Tech
+https://github.com/goldfish4tech/Goldfish4TechAirPump
 https://github.com/goncalomb/KeyMatrix
 https://github.com/GoodFilling/Motor-Driver
 https://github.com/GoogleCloudPlatform/google-cloud-iot-arduino