Update sync-to-maven-central CI job

Closes gh-13296

ci/pipeline.yml

@@ -371,9 +371,8 @@ jobs:
   plan:
   - get: spring-boot-ci-image
   - get: git-repo
-    trigger: true
   - get: artifactory-repo
-    trigger: false
+    trigger: true
     passed: [promote-release]
     params:
       save_build_info: true

ci/scripts/promote.sh

@@ -49,7 +49,7 @@ if [[ $RELEASE_TYPE = "RELEASE" ]]; then
 	WAIT_TIME=5
 	COUNTER=0
 	while [ $ARTIFACTS_PUBLISHED == "false" ] && [ $COUNTER -lt 60 ]; do
-		result=$( curl https://api.bintray.com/packages/"${BINTRAY_SUBJECT}"/"${BINTRAY_REPO}"/"${groupId}" )
+		result=$( curl -s https://api.bintray.com/packages/"${BINTRAY_SUBJECT}"/"${BINTRAY_REPO}"/"${groupId}" )
 		versions=$( echo "$result" | jq -r '.versions' )
 		exists=$( echo "$versions" | grep "$version" -o || true )
 		if [ "$exists" = "$version" ]; then