Fixed wrong branch resolution

docs/src/main/asciidoc/_project-features-wiremock.adoc

@@ -4,7 +4,7 @@ include::_attributes.adoc[]
 
 The Spring Cloud Contract WireMock modules let you use https://github.com/tomakehurst/wiremock[WireMock] in a
 Spring Boot application. Check out the
-https://github.com/spring-cloud/spring-cloud-contract/tree/{branch}/samples[samples]
+https://github.com/spring-cloud/spring-cloud-contract/tree/{github-tag}/samples[samples]
 for more details.
 
 If you have a Spring Boot application that uses Tomcat as an embedded server (which is

docs/src/main/asciidoc/howto.adoc

@@ -257,7 +257,7 @@ with your local changes.
 Assume that we have a producer with coordinates of `com.example:server` and three
 consumers: `client1`, `client2`, and `client3`. Then, in the repository with common
 contracts, you could have the following setup (which you can check out
-https://github.com/spring-cloud/spring-cloud-contract/tree/{branch}/samples/standalone/contracts[here]).
+https://github.com/spring-cloud/spring-cloud-contract/tree/{github-tag}/samples/standalone/contracts[here]).
 The following listing shows such a structure:
 
 ====

spring-cloud-contract-tools/spring-cloud-contract-maven-plugin/src/site/asciidoc/junit.adoc

@@ -28,4 +28,4 @@ include::../../../src/test/projects/spring-boot-java/src/test/java/hello/BaseAcc
 
 === Project source code
 
-https://github.com/spring-cloud/spring-cloud-contract/tree/{branch}/spring-cloud-contract-tools/spring-cloud-contract-maven-plugin/src/test/projects/spring-boot-java
+https://github.com/spring-cloud/spring-cloud-contract/tree/{github-tag}/spring-cloud-contract-tools/spring-cloud-contract-maven-plugin/src/test/projects/spring-boot-java

spring-cloud-contract-tools/spring-cloud-contract-maven-plugin/src/site/asciidoc/spock.adoc

@@ -28,4 +28,4 @@ include::../../../src/test/projects/spring-boot-groovy/src/test/groovy/hello/Bas
 
 === Project source code
 
-https://github.com/spring-cloud/spring-cloud-contract/tree/{branch}/spring-cloud-contract-tools/spring-cloud-contract-maven-plugin/src/test/projects/spring-boot-groovy
+https://github.com/spring-cloud/spring-cloud-contract/tree/{github-tag}/spring-cloud-contract-tools/spring-cloud-contract-maven-plugin/src/test/projects/spring-boot-groovy