Fix link on mask-image page

Author: reinink

src/docs/mask-image.mdx

@@ -769,7 +769,7 @@ Use utilities like `mask-radial-at-bottom-left` and `mask-radial-at-[35%_35%]` t
 
 </Figure>
 
-This is different from [`mask-position`](./docs/mask-position) which sets the position of the mask image itself, not the radial gradient.
+This is different from [`mask-position`](/docs/mask-position) which sets the position of the mask image itself, not the radial gradient.
 
 #### Setting the radial size