Update docs/classic-ui/images.md

Co-authored-by: Steve Piercy <[email protected]>

Author: MrTango

docs/classic-ui/images.md

@@ -258,7 +258,7 @@ To access image scales, which are normally not accessible to the current user, o
 ## Responsive image support
 
 Plone supports the generation of picture tags with `srcset`'s for image optimization.
-Additionally you can define `media queries` for {ref}`classic-ui-images-responsive-image-support-art-direction` and further optimization.
+Additionally you can define [media queries](https://developer.mozilla.org/en-US/docs/Web/CSS/Media_Queries/Using_media_queries) for [art direction](classic-ui-images-responsive-image-support-art-direction) and further optimization.
 
 The configuration allows to define different picture variants, like `Large`, `Medium`, `Small`.
 Users can choose from them in editors like TinyMCE and Developers can use them in templates.