Update readme

Author: zelark

README.md

@@ -2,7 +2,7 @@
 A tiny, secure, URL-friendly unique string ID generator for both Clojure and ClojureScript.
 
 [![Clojars Project](https://img.shields.io/clojars/v/nano-id.svg)](https://clojars.org/nano-id)
-[![cljdoc badge](https://cljdoc.xyz/badge/nano-id/nano-id)](https://cljdoc.xyz/d/nano-id/nano-id/CURRENT)
+[![cljdoc badge](https://cljdoc.org/badge/nano-id/nano-id)](https://cljdoc.org/d/nano-id/nano-id/CURRENT)
 [![CircleCI](https://circleci.com/gh/zelark/nano-id/tree/master.svg?style=svg)](https://circleci.com/gh/zelark/nano-id/tree/master)
 
 ### Secure