[gitlab-ci] only trigger readthedocs on branch/default

.gitlab-ci.yml

@@ -37,6 +37,9 @@ trigger-other-pipelines:
   - "if [ -z \"${TRIGGERED_FROM_OTHER_PROJECT}\" ]; then curl -X POST -F \"variables[TRIGGERED_FROM_OTHER_PROJECT]=true\" -F token=$CUBICWEB_PIPELINE_TRIGGER_TOKEN -F ref=branch/default https://forge.extranet.logilab.fr/api/v4/projects/385/trigger/pipeline; fi"
 
 trigger-readthedocs:
+  only:
+    refs:
+      - branch/default
   stage: after-tests
   script:
   - "if [ -z \"${TRIGGERED_FROM_OTHER_PROJECT}\" ]; then curl -X POST -d \"token=${READTHEDOCS_TOKEN}\" https://readthedocs.org/api/v2/webhook/yams/109442/; fi"