This keyboard shortcut is not working, regardless of keyboard. I tried the built-in laptop keyboard and an external keyboard. I was able to confirm that the keystroke is being recorded correctly in the “File > Options > Keyboard” panel. It does not currently cause anything to happen, even though it’s set to jump to the Toolbar Quick Search Field.
EDIT TO ADD:
It looks like the option in the “Edit > Find > Quick Search” also does not work to put the focus on the Quick Search field.