It's in the Panel menu > Cross-References section of Edit > Keyboard Shortcuts > Product Area.
The easiest way to find a particular command is to click the Show Set button on the right. This opens a text list of all the available shortcuts in the default text editor for your platform. Choose Edit > Find and search for it.
Thanks Steve that's a good tip that I hadn't thought of. I did wonder why unlike AI there's no search inside the Keyboard Shortcuts Panel given how many items there are and how they often have multiple access points, via menus, panels tool bar etc.
I can't mark this as correct, or do actions on my own posts, perhaps this is a Safari thing? I can't open Chrome b/c I have 200 tabs in it to go through!