[bsp][stm32] fixed Kconfig multi-line strings warning
@@ -215,7 +215,7 @@ menu "Hardware Drivers Config"
select RT_USING_PWM
if BSP_USING_PWM
config BSP_USING_PWM1
- bool "Using PWM1
+ bool "Using PWM1"
default n
if BSP_USING_PWM1
config BSP_USING_PWM1_CH1
