boards: arm: nucleo_g0b1re: update pinctrl node file
boards: arm: nucleo_g0b1re: update pinctrl node file

The file with pinctrl nodes has been updated to
st/g0/stm32g0b1r(b-c-e)tx-pinctrl.dtsi for this board.

Signed-off-by: Gerard Marull-Paretas <bedb45f43a286e49f4dcda039a436b216ae61ef3@nordicsemi.no>

zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,galak/zephyr,galak/zephyr,finikorg/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,galak/zephyr,finikorg/zephyr