RFC Minor Addition to "Trigger Macro by Name" Docs

I added a sub-section to the How To Use section of the "Trigger Macro by Name" docs re: use of the key. Please make or suggest corrections as needed.

Here's a diff highlighting the addition. ↓

https://wiki.keyboardmaestro.com/action/Trigger_Macro_by_Name?do=diff&rev2[0]=1667989098&rev2[1]=1667989831&difftype=sidebyside