Use an app that can redefine shortcuts, e.g. BetterTouchTool or Keyboard Maestro. It’s as easy as setting a trigger shortcut and then the action shortcut.
There probably are some free apps that can do that but I don’t know any, haven’t searched. I’ve been using BTT which is one-time purchase for life and it’s pretty useful all around, not just for Figma.
For Windows there is a free app called AutoHotKey.
Figma doesn’t have any features for changing shortcuts natively. You can vote for this suggestion: Customizable shortcuts