board: fix led1 on nucleo_h743 platform
board: fix led1 on nucleo_h743 platform

led1 is mapped on PE1 instead of PB7.
led color is yellow instead of blue.

Signed-off-by: Nicolas VINCENT <bf1fab8e8ae5f19954e27cd4beab79cce48f8e9f@vossloh.com>

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