Fix wssOptions typo (#27)

Author: Birkenstab

README.md

@@ -21,7 +21,7 @@ All you need to do is to add it to your project with `register` and you are done
 
 const fastify = require('fastify')()
 
-const wssOtions = {
+const wssOptions = {
   maxPayload: 1048576, // we set the maximum allowed messages size to 1 MiB (1024 bytes * 1024 bytes)
   path: '/fastify', // we accept only connections matching this path e.g.: ws://localhost:3000/fastify
   verifyClient: function (info, next) {