docs: fix md ref

Co-authored-by: Joel Challis <[email protected]>

docs/feature_macros.md

@@ -42,7 +42,7 @@ You can define up to 32 macros in a `keymap.json` file, as used by [Configurator
 
 ### Selecting Your Host Keyboard Layout
 
-If you type in a language other than English, or use a non-QWERTY layout like Colemak, Dvorak, or Workman, you may have set your computer's input language to match this layout. This presents a challenge when creating macros — you may need to type different keys to get the same letters! To address this you can use [language-specific keycodes](./reference_keymap_extras.md).
+If you type in a language other than English, or use a non-QWERTY layout like Colemak, Dvorak, or Workman, you may have set your computer's input language to match this layout. This presents a challenge when creating macros — you may need to type different keys to get the same letters! To address this you can use [language-specific keycodes](reference_keymap_extras).
 
 ### Macro Basics