Fix: Excluded release trigger from schedules (coscine/issues#987)

.gitlab-ci.yml

 stages:
   - test
-  - docs
   - release
   - releasetrigger
   - schedule
@@ -55,6 +54,8 @@ cake:GitlabRelease:
     - PowerShell .\build.ps1 -Target GitlabRelease --GitlabProjectPath="${CI_PROJECT_PATH}" --gitlabProjectId="${CI_PROJECT_ID}" --gitlabToken="${GITLAB_TOKEN}"
   only:
     - master
+  except:
+    - schedules
 
 cake:PushToGit:
   stage: schedule