jenkins.sh in govuk_content_models-8.0.0 vs jenkins.sh in govuk_content_models-8.1.0

@@ -2,6 +2,8 @@
 set -e
 rm -f Gemfile.lock
 bundle install --path "${HOME}/bundles/${JOB_NAME}"
 export GOVUK_APP_DOMAIN=dev.gov.uk
 bundle exec rake
-bundle exec rake publish_gem
+if [[ -n "$PUBLISH_GEM" ]]; then
+  bundle exec rake publish_gem
+fi