doc: reference: fix typo
doc: reference: fix typo

Fix typo.

Signed-off-by: Mark-PK Tsai <8214a4cd15e7d4f27d5159a5c353c7920ecd7dc0@mediatek.com>

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