[#2019] Upgrade to hibernate-jenkins-pipeline-helpers 1.18

To avoid buggy notifications.
See https://hibernate.zulipchat.com/#narrow/channel/132096-hibernate-user/topic/Jenkins.20Notifications

Full changeset:

https://github.com/hibernate/hibernate-jenkins-pipeline-helpers/compare/1.13..1.18
https://github.com/hibernate/hibernate-jenkins-pipeline-helpers/compare/1.17..1.18

Author: yrodiere

ci/release/Jenkinsfile

@@ -9,7 +9,7 @@
 /*
  * See https://github.com/hibernate/hibernate-jenkins-pipeline-helpers
  */
-@Library('hibernate-jenkins-pipeline-helpers@1.17') _
+@Library('hibernate-jenkins-pipeline-helpers@1.18') _
 
 import org.hibernate.jenkins.pipeline.helpers.version.Version
 

ci/snapshot-publish.Jenkinsfile

@@ -1,7 +1,7 @@
 /*
  * See https://github.com/hibernate/hibernate-jenkins-pipeline-helpers
  */
-@Library('hibernate-jenkins-pipeline-helpers@1.13') _
+@Library('hibernate-jenkins-pipeline-helpers@1.18') _
 
 // Avoid running the pipeline on branch indexing
 if (currentBuild.getBuildCauses().toString().contains('BranchIndexingCause')) {