Update README - static IP issue

[cavetronic]

Please update the Static IP for eth0 paragraph due to the /etc/dhcpcd.conf method outdated.

I've used the method described here: Static IP with Bookworm](https://forums.raspberrypi.com/viewtopic.php?p=2172437#p2172437)

sudo nmcli c m "Wired connection 1" ipv4.addresses [192.168.1.5/24](http://192.168.1.5/24) ipv4.method manual
sudo nmcli c m "Wired connection 1" ipv4.gateway 0.0.0.0
sudo nmcli c down "Wired connection 1" && sudo nmcli c up "Wired connection 1"