Forgot a comma

Change-Id: I1e92e0969acc00d27840c0fe73a8b5f5e75efb90
diff --git a/Jenkinsfile.release b/Jenkinsfile.release
index ff3c19c..76e5d56 100644
--- a/Jenkinsfile.release
+++ b/Jenkinsfile.release
@@ -48,7 +48,7 @@
     }
 
     stage ('Verify code') {
-        def found = sh script:'egrep -R SNAPSHOT .' returnStatus:true
+        def found = sh script:'egrep -R SNAPSHOT .', returnStatus:true
         if (found == 0) {
             timeout(time: 1, unit: 'HOURS') {
                 metadata = input id: 'manual-verify',