Update repositories.txt (#6293)

Author: fabik111

repositories.txt

@@ -1066,6 +1066,7 @@ https://github.com/arduino-libraries/Arduino_MKRMEM
 https://github.com/arduino-libraries/Arduino_MKRRGB
 https://github.com/arduino-libraries/Arduino_MKRTHERM
 https://github.com/arduino-libraries/Arduino_MultiWiFi
+https://github.com/arduino-libraries/Arduino_NetworkConfigurator
 https://github.com/arduino-libraries/Arduino_NiclaSenseEnv
 https://github.com/arduino-libraries/Arduino_NineAxesMotion
 https://github.com/arduino-libraries/Arduino_OAuth