Update link targets to avoid redirects. (#5604)

docs/tutorials/stateful-application/basic-stateful-set.md

@@ -55,7 +55,7 @@ After this tutorial, you will be familiar with the following.
 Begin by creating a StatefulSet using the example below. It is similar to the 
 example presented in the
 [StatefulSets](/docs/concepts/abstractions/controllers/statefulsets/) concept. 
-It creates a [Headless Service](/docs/user-guide/services/#headless-services), 
+It creates a [Headless Service](/docs/concepts/services-networking/service/#headless-services), 
 `nginx`, to publish the IP addresses of Pods in the StatefulSet, `web`. 
 
 {% include code.html language="yaml" file="web.yaml" ghlink="/docs/tutorials/stateful-application/web.yaml" %}

docs/tutorials/stateful-application/zookeeper.md

@@ -89,7 +89,7 @@ safely discarded.
 ## Creating a ZooKeeper Ensemble
 
 The manifest below contains a 
-[Headless Service](/docs/user-guide/services/#headless-services), 
+[Headless Service](/docs/concepts/services-networking/service/#headless-services), 
 a [ConfigMap](/docs/tasks/configure-pod-container/configmap/), 
 a [PodDisruptionBudget](/docs/admin/disruptions/#specifying-a-poddisruptionbudget), 
 and a [StatefulSet](/docs/concepts/abstractions/controllers/statefulsets/).