Migrate to main branch.

See #1750.

CI.adoc

@@ -1,6 +1,6 @@
 = Continuous Integration
 
-image:https://jenkins.spring.io/buildStatus/icon?job=spring-data-elasticsearch%2Fmaster&subject=2020.0.0%20(master)[link=https://jenkins.spring.io/view/SpringData/job/spring-data-elasticsearch/]
+image:https://jenkins.spring.io/buildStatus/icon?job=spring-data-elasticsearch%2Fmain&subject=2020.0.0%20(main)[link=https://jenkins.spring.io/view/SpringData/job/spring-data-elasticsearch/]
 image:https://jenkins.spring.io/buildStatus/icon?job=spring-data-elasticsearch%2F4.0.x&subject=Neumann%20(4.0.x)[link=https://jenkins.spring.io/view/SpringData/job/spring-data-elasticsearch/]
 image:https://jenkins.spring.io/buildStatus/icon?job=spring-data-elasticsearch%2F3.2.x&subject=Moore%20(3.2.x)[link=https://jenkins.spring.io/view/SpringData/job/spring-data-elasticsearch/]
 

CONTRIBUTING.adoc

@@ -1,6 +1,6 @@
 = Spring Data contribution guidelines
 
-You find the contribution guidelines for Spring Data projects https://github.com/spring-projects/spring-data-build/blob/master/CONTRIBUTING.adoc[here].
+You find the contribution guidelines for Spring Data projects https://github.com/spring-projects/spring-data-build/blob/main/CONTRIBUTING.adoc[here].
 
 == Running the test locally
 

Jenkinsfile

@@ -3,7 +3,7 @@ pipeline {
 
 	triggers {
 		pollSCM 'H/10 * * * *'
-		upstream(upstreamProjects: "spring-data-commons/master", threshold: hudson.model.Result.SUCCESS)
+		upstream(upstreamProjects: "spring-data-commons/main", threshold: hudson.model.Result.SUCCESS)
 	}
 
 	options {
@@ -15,7 +15,7 @@ pipeline {
 		stage("test: baseline (jdk8)") {
 			when {
 				anyOf {
-					branch 'master'
+					branch 'main'
 					not { triggeredBy 'UpstreamCause' }
 				}
 			}
@@ -44,7 +44,7 @@ pipeline {
 		stage("Test other configurations") {
 			when {
 				allOf {
-					branch 'master'
+					branch 'main'
 					not { triggeredBy 'UpstreamCause' }
 				}
 			}
@@ -100,7 +100,7 @@ pipeline {
 		stage('Release to artifactory') {
 			when {
 				anyOf {
-					branch 'master'
+					branch 'main'
 					not { triggeredBy 'UpstreamCause' }
 				}
 			}
@@ -132,7 +132,7 @@ pipeline {
 		}
 		stage('Publish documentation') {
 			when {
-				branch 'master'
+				branch 'main'
 			}
 			agent {
 				label 'data'

README.adoc

@@ -1,6 +1,6 @@
 image:https://spring.io/badges/spring-data-elasticsearch/ga.svg[Spring Data Elasticsearch,link=https://projects.spring.io/spring-data-elasticsearch#quick-start] image:https://spring.io/badges/spring-data-elasticsearch/snapshot.svg[Spring Data Elasticsearch,link=https://projects.spring.io/spring-data-elasticsearch#quick-start]
 
-= Spring Data for Elasticsearch image:https://jenkins.spring.io/buildStatus/icon?job=spring-data-elasticsearch%2Fmaster&subject=Build[link=https://jenkins.spring.io/view/SpringData/job/spring-data-elasticsearch/] https://gitter.im/spring-projects/spring-data[image:https://badges.gitter.im/spring-projects/spring-data.svg[Gitter]]
+= Spring Data for Elasticsearch image:https://jenkins.spring.io/buildStatus/icon?job=spring-data-elasticsearch%2Fmain&subject=Build[link=https://jenkins.spring.io/view/SpringData/job/spring-data-elasticsearch/] https://gitter.im/spring-projects/spring-data[image:https://badges.gitter.im/spring-projects/spring-data.svg[Gitter]]
 
 The primary goal of the https://projects.spring.io/spring-data[Spring Data] project is to make it easier to build Spring-powered applications that use new data access technologies such as non-relational databases, map-reduce frameworks, and cloud based data services.
 
@@ -217,7 +217,7 @@ The generated documentation is available from `target/site/reference/html/index.
 
 == Examples
 
-For examples on using the Spring Data for Elasticsearch, see the https://github.com/spring-projects/spring-data-examples/tree/master/elasticsearch/example[spring-data-examples] project.
+For examples on using the Spring Data for Elasticsearch, see the https://github.com/spring-projects/spring-data-examples/tree/main/elasticsearch/example[spring-data-examples] project.
 
 == License