Fix wiki.vg url in readme (#2480)

Author: BradBot1

Readme.md

@@ -2,7 +2,7 @@
 
 Certain tasks are impossible to perform with the standard Bukkit API, and may require
 working with and even modifying Minecraft directly. A common technique is to modify incoming
-and outgoing [packets](https://www.wiki.vg/Protocol), or inject custom packets into the
+and outgoing [packets](https://wiki.vg/Protocol), or inject custom packets into the
 stream. This is quite cumbersome to do, however, and most implementations will break
 as soon as a new version of Minecraft has been released, mostly due to obfuscation.