[gitlab-ci] makes curl fails on bad http code and display it

.gitlab-ci.yml

@@ -25,4 +25,5 @@ trigger-other-pipelines:
       - $TRIGGERED_FROM_OTHER_PROJECT
   stage: after-tests
   script:
-  - curl -X POST -F "variables[TRIGGERED_FROM_OTHER_PROJECT]=true" -F token=$CUBICWEB_PIPELINE_TRIGGER_TOKEN -F ref=branch/default https://forge.extranet.logilab.fr/api/v4/projects/385/trigger/pipeline
+  # regarding the " everywhere when there is a '%': yaml is extremly weird when % are involved
+  - curl -X POST -F "variables[TRIGGERED_FROM_OTHER_PROJECT]=true" -F token=$CUBICWEB_PIPELINE_TRIGGER_TOKEN -F ref=branch/default https://forge.extranet.logilab.fr/api/v4/projects/385/trigger/pipeline -w "\nhttp code:"\ "%{http_code}\n" -f