fix typo

"load your newly flashed firmware" not "load your newfly flashed fireware"

Author: chad3814

Diff for: docs/docs/user-setup.md

@@ -189,7 +189,7 @@ To flash the firmware, first put your board into bootloader mode by double click
 or the one that is part of your keyboard). The controller should appear in your OS as a new USB storage device.
 
 Once this happens, copy the correct UF2 file (e.g. left or right if working on a split), and paste it onto the root of that USB mass
-storage device. Once the flash is complete, the controller should automatically restart, and load your newfly flashed firmware.
+storage device. Once the flash is complete, the controller should automatically restart, and load your newly flashed firmware.
 
 ## Wirelessly Connecting Your Keyboard