improve readme

Author: rikschennink

README.md

@@ -2,4 +2,6 @@
 
 [![npm version](https://badge.fury.io/js/filepond-plugin-file-validate-size.svg)](https://badge.fury.io/js/filepond)
 
-https://pqina.nl/filepond
+https://pqina.nl/filepond/docs/patterns/plugins/file-validate-size/
+
+The File Size Validation plugin is used to block files that are too large to upload. Set a maximum size for single files and a maximum size for all files.