Align examples port: 10090 with what is default in gui and readme.md

[andy778]

Would be convenient for first time users if this default is right as found from https://github.com/home-assistant/core/blob/dev/homeassistant/components/nibe_heatpump/config_flow.py

target:

• ip: 192.168.16.130 port: 10090 -> 9999

  Exist in both lilygo-t-can485.yaml and esp32_max485.yaml