Add link to processing changeset

Author: 11bit

.changeset/social-pots-push.md

@@ -2,4 +2,4 @@
 "@imgproxy/imgproxy-js-core": minor
 ---
 
-Add support for `preset` param to webp option
+Add support for `preset` param to [webp option](https://docs.imgproxy.net/latest/usage/processing#webp-options)