Never return type for reset::restart

[stabl-gjn]

I noticed that reset::restart does not have a return type. As the device is restarting and thus never leaving this function wouldn't it make sense to set the return type as the never type / !?

The generated c ffi function binding are already using this as return value:

extern "C" {
    #[doc = " @brief  Restart PRO and APP CPUs.\n\n This function can be called both from PRO and APP CPUs.\n After successful restart, CPU reset reason will be SW_CPU_RESET.\n Peripherals (except for WiFi, BT, UART0, SPI1, and legacy timers) are not reset.\n This function does not return."]
    pub fn esp_restart() -> !;
}