Migrate to main branch.

See #571.

CI.adoc

@@ -1,6 +1,6 @@
 = Continuous Integration
 
-image:https://jenkins.spring.io/buildStatus/icon?job=spring-data-r2dbc%2Fmaster&subject=master["Spring Data R2DBC", link="https://jenkins.spring.io/view/SpringData/job/spring-data-r2dbc/"]
+image:https://jenkins.spring.io/buildStatus/icon?job=spring-data-r2dbc%2Fmain&subject=main["Spring Data R2DBC", link="https://jenkins.spring.io/view/SpringData/job/spring-data-r2dbc/"]
 
 == Running CI tasks locally
 

CONTRIBUTING.adoc

@@ -1,3 +1,3 @@
 = 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].

Jenkinsfile

@@ -3,7 +3,7 @@ pipeline {
 
 	triggers {
 		pollSCM 'H/10 * * * *'
-		upstream(upstreamProjects: "spring-data-commons/master,spring-data-jdbc/master", threshold: hudson.model.Result.SUCCESS)
+		upstream(upstreamProjects: "spring-data-commons/main,spring-data-jdbc/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' }
 				}
 			}
@@ -133,7 +133,7 @@ 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-r2dbc/snapshot.svg["Spring Data R2DBC", link="https://spring.io/projects/spring-data-r2dbc#learn"]
 
-= Spring Data R2DBC image:https://jenkins.spring.io/buildStatus/icon?job=spring-data-r2dbc%2Fmaster&subject=Build[link=https://jenkins.spring.io/view/SpringData/job/spring-data-r2dbc/] https://gitter.im/spring-projects/spring-data[image:https://badges.gitter.im/spring-projects/spring-data.svg[Gitter]]
+= Spring Data R2DBC image:https://jenkins.spring.io/buildStatus/icon?job=spring-data-r2dbc%2Fmain&subject=Build[link=https://jenkins.spring.io/view/SpringData/job/spring-data-r2dbc/] 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 data access technologies. *Spring Data R2DBC* offers the popular Repository abstraction based on https://r2dbc.io[R2DBC].