Fix deadlink

zookeeper/content.md

@@ -94,7 +94,7 @@ The id must be unique within the ensemble and should have a value between 1 and
 
 This variable allows you to specify a list of machines of the Zookeeper ensemble. Each entry has the form of `server.id=host:port:port`. Entries are separated with space. Do note that this variable will not have any effect if you start the container with a `/conf` directory that already contains the `zoo.cfg` file.
 
-In 3.5, the syntax of this has changed. Servers should be specified as such: `server.id=<address1>:<port1>:<port2>[:role];[<client port address>:]<client port>` [Zookeeper Dynamic Reconfiguration](http://zookeeper.apache.org/doc/trunk/zookeeperReconfig.html)
+In 3.5, the syntax of this has changed. Servers should be specified as such: `server.id=<address1>:<port1>:<port2>[:role];[<client port address>:]<client port>` [Zookeeper Dynamic Reconfiguration](http://zookeeper.apache.org/doc/r3.5.3-beta/zookeeperReconfig.html)
 
 ## Where to store data