STM32 rtic-monotonics APB register names incompatible

[Patrik Bachan]

Hi,
I am trying to use most recent STM32 rtic-monotonics addition #796 with STM32H730VB and build fails, because apb* register names don't match expectations

rtic/rtic-monotonics/src/stm32.rs

Line 300 in 54aec9b

 enable_timer!(apbenr1, set_tim3en, apbrstr1, set_tim3rst); 

needs to be changed to

enable_timer!(apb1lenr, set_tim3en, apb1lrstr, set_tim3rst);

and similarly for other timers.