HV-1860 Add GitHub SSH keys to SSH agent during Jenkinsfile release

Jenkinsfile

@@ -368,7 +368,7 @@ stage('Deploy') {
 		runBuildOnNode {
 			helper.withMavenWorkspace(mavenSettingsConfig: params.RELEASE_DRY_RUN ? null : helper.configuration.file.deployment.maven.settingsId) {
 				configFileProvider([configFile(fileId: 'release.config.ssh', targetLocation: env.HOME + '/.ssh/config')]) {
-					sshagent(['hibernate.filemgmt.jboss.org', 'hibernate-ci.frs.sourceforge.net']) {
+					sshagent(['ed25519.Hibernate-CI.github.com', 'hibernate.filemgmt.jboss.org', 'hibernate-ci.frs.sourceforge.net']) {
 						sh 'cat $HOME/.ssh/config'
 						sh "git clone https://github.com/hibernate/hibernate-noorm-release-scripts.git"
 						sh "bash -xe hibernate-noorm-release-scripts/prepare-release.sh validator ${releaseVersion.toString()}"