Fix a missing comma

Change-Id: I6a7e41429171cceb22a54c93034b03658b3d656e
diff --git a/cicd/jobs/images.jenkins b/cicd/jobs/images.jenkins
index 65cb5d6..09a5d8b 100644
--- a/cicd/jobs/images.jenkins
+++ b/cicd/jobs/images.jenkins
@@ -1,7 +1,7 @@
 #!/usr/bin/env groovy
 
 def boards = [
-    "enterprise"
+    "enterprise",
     "excelsior"
 ]