Naming error in serial.rs module

[furkannyldrm]

[[package]]
name = "stm32f3xx-hal"
version = "0.10.0"

There is a mistake about naming in the "Event" enum. TransmitDataRegisterEmtpy variant should be TransmitDataRegisterEmpty.

I know it's not a major issue, but the AI ​​is constantly correcting it, and sometimes it's causing a struggle.