Jenkinsfile: tweak polling interval
diff --git a/Jenkinsfile b/Jenkinsfile
index d76eeb1..39596af 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -79,7 +79,7 @@
        }
     }
     triggers {
-        pollSCM('* H/2 * * *')
+        pollSCM('H H/2 * * *')
     }
     stages {
         stage('Tycho') {