Update Onionoo docs URL

README.md

@@ -132,7 +132,7 @@ Returns a Promise that will resolve once the Onionoo API has responded. The resp
 
 Type: `object`
 
-Query object to be url encoded and appended to the `baseUrl`. You can read up on the vast amount of accepted parameters in the [Onionoo API docs](https://onionoo.torproject.org/protocol.html#methods).
+Query object to be url encoded and appended to the `baseUrl`. You can read up on the vast amount of accepted parameters in the [Onionoo API docs](https://metrics.torproject.org/onionoo.html#parameters).
 
 > Note: Colons are not url encoded to allow for Onionoo's `key:value` search filters.