Update keyboards/gray_studio/space65/keymaps/billiams/readme.md

Co-Authored-By: James Young <18669334+noroadsleft@users.noreply.github.com>

keyboards/gray_studio/space65/keymaps/billiams/readme.md

@@ -65,7 +65,7 @@ Hope this helps!
 `------------------------------------------------------------------------------------------------'
 ```
 
-### 2 Fn Layer - Just for bootleg mode button
+### 2 Fn Layer - Just for bootloader mode button
 ```
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