Add details to documentation on how to change the keybind

[virgiliu]

I already have the color picker shortcut bound for something else but the documentation doesn't mention how to change the keybind to show ColorPicker.

[lcx]

{ "keys": ["super+shift+c"], "command": "color_pick" }

change as needed

[alpracka]

Remap via Key Bindings - User doesn't work (osx)