install device-tree-compiler:
sudo apt update; sudo apt install device-tree-compiler -y
backup original:
mv meson-g12a-radxa-zero.dtb meson-g12a-radxa-zero.dtb.orig
decompile:
dtc -I dtb -O dts meson-g12a-radxa-zero.dtb.orig -o meson-g12a-radxa-zero.dts
edit the dts file, scroll down to led section and change the following.
from: gpios = <0x4f 0x08 0x00>;
to : gpios = <0x4f 0x0a 0x00>;
compile and reboot
dtc -I dts -O dtb meson-g12a-radxa-zero.dts -o meson-g12a-radxa-zero.dtb
There are other options as well, but this is probs the most simple method.