Update repositories.txt - NetApiHelpers library (#3638)

Author: JAndrassy

repositories.txt

@@ -3922,6 +3922,7 @@ https://github.com/jandelgado/jled-pca9685-hal
 https://github.com/jandelgado/log4arduino
 https://github.com/jandrassy/ArduinoOTA
 https://github.com/jandrassy/EthernetENC
+https://github.com/jandrassy/NetApiHelpers
 https://github.com/jandrassy/StreamLib
 https://github.com/jandrassy/TelnetStream
 https://github.com/jandrassy/UnoWiFiDevEdSerial1