Update ebcDockerBuilderRCO.jenkinsfile (#739)

Fix syntax

Author: leochr

ebcDockerBuilderRCO.jenkinsfile

@@ -18,7 +18,7 @@ properties([
       string(name: 'PIPELINE_REGISTRY', defaultValue: "cp.stg.icr.io", description: 'staging registry to push images to'),
       string(name: 'ARTIFACTORY_REPO_URL', defaultValue: "hyc-taas-onepipeline-team-docker-local.artifactory.swg-devops.com", description: 'artifactory repo url [only used if disable artifactory is false]]'),
       string(name: 'DISABLE_ARTIFACTORY', defaultValue: "false", description: 'whether to back up container images to artifactorys'),
-      string(name: 'COMMON_OPERATORS_BRANCH', defaultValue: "main", description: 'branch to use for websphere/operators repository')
+      string(name: 'COMMON_OPERATORS_BRANCH', defaultValue: "main", description: 'branch to use for websphere/operators repository'),
       string(name: 'COMMON_DIR', defaultValue: "/runtime-component-operator/operators", description: 'Base location of the common scripts')
    ])
 ])