MCU_ST_STM32: Correct spelling and improve readability of all component descriptions
MCU_ST_STM32: Correct spelling and improve readability of all component descriptions

stambaughw/kicad-library,crackerizer/kicad-library,true-nature/kicad-library,pointhi/kicad-library,stambaughw/kicad-library,crackerizer/kicad-library,true-nature/kicad-library