Update repositories.txt (#5377)

Add MVP3000 to Arduino library manager.

Author: ferdinand0815

repositories.txt

@@ -4892,6 +4892,7 @@ https://github.com/PribaNosati/mrm-us-b
 https://github.com/PribaNosati/mrm-us1
 https://github.com/printoo/printoo_library
 https://github.com/PrivateHomeIoT/SecureMQTT
+https://github.com/Production3000/mvp3000esp
 https://github.com/ProfTahseen/Tarmos
 https://github.com/ProgettoCompany/Progetto_One_Pin_Keypad_Arduino_Library
 https://github.com/Programmable-Air/Code