docs: typo in button

Author: benjamincanac

docs/content/2.elements/3.button.md

@@ -37,7 +37,7 @@ props:
 Button
 ::
 
-Besides all the colors from the `ui.colors` object, you can also use the `white` and `gray` and `black` colors with their pre-defined variants.
+Besides all the colors from the `ui.colors` object, you can also use the `white`, `gray` and `black` colors with their pre-defined variants.
 
 #### White