The sheet exists but is 2009 so way out of date (link below)
However if you open the Keyboard Shortcuts window there’s a button to ‘Print Bindings (to your web browser)’ which ought to be absolutely accurate (and include your own key bindings)
(the underscore between cheat & sheet is the typo)
It’s better but also out of date.
I tried making changes to the manual at GitHub but they’re still in the queue, so stick to the Print Bindings… for now