docs/users: update pokedox.org URL (#9192)

* pokedox.org is down
* https://github.com/nolanlawson/pokedex.org is up
* project is actually called "pokedox.org"

Author: alxndrsn

docs/users.md

@@ -94,7 +94,7 @@ Data is stored locally on device in PouchDB database and can be synced to the cl
 
 {% include img.html width=100 src="pokedexorg-logo.png" alt="Pokedex.org logo" %}
 
-[Pokedex.org](https://www.pokedex.org/) [(Github)](https://github.com/nolanlawson/pokedex.org) is a progressive web app, powered by ServiceWorker, PouchDB, virtual-dom, and web workers.
+[Pokedex.org](https://github.com/nolanlawson/pokedex.org) is a progressive web app, powered by ServiceWorker, PouchDB, virtual-dom, and web workers.
 
 ## Quizster