fix broken reference

Author: felixheck

README.md

@@ -15,7 +15,7 @@
 ---
 
 ## Introduction
-**hapi-auth-keycloak** is a plugin for [hapi.js](hapijs] which enables to protect your endpoints in a smart but professional manner using [Keycloak][keycloak] as authentication service. It is inspired by the related [express.js middleware][keycloak-node]. The plugin validates the passed [`Bearer` token][bearer] online with help of the [Keycloak][keycloak] server and optionally caches successfully validated tokens and the related user data using [`catbox`][catbox]. The caching enables a fast processing although the user data don't get changed until the token expires. It plays well with the [hapi.js][hapijs]-integrated [authentication feature][hapi-route-options]. Besides the authentication strategy it is possible to validate tokens by yourself, e.g. to authenticate incoming websocket or queue messages.
+**hapi-auth-keycloak** is a plugin for [hapi.js][hapijs] which enables to protect your endpoints in a smart but professional manner using [Keycloak][keycloak] as authentication service. It is inspired by the related [express.js middleware][keycloak-node]. The plugin validates the passed [`Bearer` token][bearer] online with help of the [Keycloak][keycloak] server and optionally caches successfully validated tokens and the related user data using [`catbox`][catbox]. The caching enables a fast processing although the user data don't get changed until the token expires. It plays well with the [hapi.js][hapijs]-integrated [authentication feature][hapi-route-options]. Besides the authentication strategy it is possible to validate tokens by yourself, e.g. to authenticate incoming websocket or queue messages.
 
 This plugin is implemented in ECMAScript 6 without any transpilers like [`babel`][babel].<br/>
 Additionally [`standard`][standardjs] and [`ava`][avajs] are used to grant a high quality implementation.<br/>