Fix broken sidebar link

SIDEBAR.md

@@ -8,11 +8,11 @@ There's more to building RESTful web services than is covered here. You may want
 * [Building a Hypermedia Driven REST Web Service][gs-rest-hateoas]
 * [Consuming RESTful web services on Android][gs-consuming-rest-android]
 * [Consuming XML from a RESTful Web Service on Android][gs-consuming-rest-xml-android]
-* [Building a RESTful web service with Bootstrap Actuators][gs-actuator-service]
+* [Building a RESTful web service with Bootstrap Actuator][gs-actuator-service]
 
 [gs-consuming-rest]: /guides/gs/consuming-rest/content
 [gs-consuming-rest-android]: /guides/gs/consuming-rest-android/content
-[gs-rest-hateoas]: /guides/gs/gs-rest-hateoas/content
+[gs-rest-hateoas]: /guides/gs/rest-hateoas/content
 [gs-consuming-rest-xml-android]: /guides/gs/consuming-rest-xml-android/content
 [gs-actuator-service]: /guides/gs/actuator-service/content