Updates docs to reference 4.0.x

Author: spencergibb

README.adoc

@@ -397,7 +397,7 @@ from the `file` menu.
 
 == Contributing
 
-:spring-cloud-build-branch: master
+:spring-cloud-build-branch: 4.0.x
 
 Spring Cloud is released under the non-restrictive Apache 2.0 license,
 and follows a very standard Github development process, using Github

docs/src/main/asciidoc/README.adoc

@@ -1,4 +1,4 @@
-image::https://travis-ci.org/spring-cloud/spring-cloud-zookeeper.svg?branch=master[Build Status, link=https://travis-ci.org/spring-cloud/spring-cloud-zookeeper]
+image::https://github.com/spring-cloud/spring-cloud-zookeeper/workflows/Build/badge.svg?style=svg["Actions Status", link="https://github.com/spring-cloud/spring-cloud-zookeeper/actions"]
 
 include::intro.adoc[]
 
@@ -39,8 +39,8 @@ Doing so brings in the required Spring Cloud Maven repositories and Build.
 
 == Building
 
-include::https://raw.githubusercontent.com/spring-cloud/spring-cloud-build/master/docs/src/main/asciidoc/building.adoc[]
+include::https://raw.githubusercontent.com/spring-cloud/spring-cloud-build/4.0.x/docs/src/main/asciidoc/building.adoc[]
 
 == Contributing
 
-include::https://raw.githubusercontent.com/spring-cloud/spring-cloud-build/master/docs/src/main/asciidoc/contributing.adoc[]
+include::https://raw.githubusercontent.com/spring-cloud/spring-cloud-build/4.0.x/docs/src/main/asciidoc/contributing.adoc[]

docs/src/main/asciidoc/spring-cloud-zookeeper.adoc

@@ -140,11 +140,11 @@ If you would like to disable the Zookeeper Discovery Client, you can set
 === Using the DiscoveryClient
 
 Spring Cloud has support for
-https://github.com/spring-cloud/spring-cloud-netflix/blob/master/docs/src/main/asciidoc/spring-cloud-netflix.adoc#spring-cloud-feign[Feign]
+https://docs.spring.io/spring-cloud-openfeign/docs/current/reference/html/[OpenFeign]
 (a REST client builder),
-https://github.com/spring-cloud/spring-cloud-netflix/blob/master/docs/src/main/ascii[Spring
+https://docs.spring.io/spring-cloud-commons/docs/current/reference/html/#rest-template-loadbalancer-client[Spring
 `RestTemplate`] and
-https://cloud.spring.io/spring-cloud-commons/reference/html/#loadbalanced-webclient[Spring WebFlux], using logical service names instead of physical URLs.
+https://docs.spring.io/spring-cloud-commons/docs/current/reference/html/#webclinet-loadbalancer-clientt[Spring WebFlux], using logical service names instead of physical URLs.
 
 You can also use the `org.springframework.cloud.client.discovery.DiscoveryClient`, which
 provides a simple API for discovery clients that is not specific to Netflix, as shown in
@@ -238,11 +238,11 @@ The following topics cover how to work with Spring Cloud Zookeeper dependencies:
 Spring Cloud Zookeeper gives you a possibility to provide dependencies of your application
 as properties. As dependencies, you can understand other applications that are registered
 in Zookeeper and which you would like to call through
-https://github.com/spring-cloud/spring-cloud-netflix/blob/master/docs/src/main/asciidoc/spring-cloud-netflix.adoc#spring-cloud-feign[Feign]
+https://docs.spring.io/spring-cloud-openfeign/docs/current/reference/html/[OpenFeign]
 (a REST client builder),
-https://github.com/spring-cloud/spring-cloud-netflix/blob/master/docs/src/main/ascii[Spring
+https://docs.spring.io/spring-cloud-commons/docs/current/reference/html/#rest-template-loadbalancer-client[Spring
 `RestTemplate`] and
-https://cloud.spring.io/spring-cloud-commons/reference/html/#loadbalanced-webclient[Spring WebFlux].
+https://docs.spring.io/spring-cloud-commons/docs/current/reference/html/#webclinet-loadbalancer-client[Spring WebFlux].
 
 You can also use the Zookeeper Dependency Watchers functionality to control and monitor
 the state of your dependencies.
@@ -585,7 +585,7 @@ public class CustomCuratorFrameworkConfig {
 }
 ----
 Consult
-https://github.com/spring-cloud/spring-cloud-zookeeper/blob/master/spring-cloud-zookeeper-core/src/main/java/org/springframework/cloud/zookeeper/ZookeeperAutoConfiguration.java[the ZookeeperAutoConfiguration class]
+https://github.com/spring-cloud/spring-cloud-zookeeper/blob/4.0.x/spring-cloud-zookeeper-core/src/main/java/org/springframework/cloud/zookeeper/ZookeeperAutoConfiguration.java[the ZookeeperAutoConfiguration class]
 to see how the `CuratorFramework` bean's default configuration.
 
 Alternatively, you can add your credentials from a class that depends on the existing