Update .gitlab-ci.yml

.gitlab-ci.yml

 # This file is a template, and might need editing before it works on your project.
+
+trigger_build:
+  stage: deploy
+  script:
+    - "curl -X POST -F token=4ca535b69f6ee1a0b1766f2f8ebad8 -F ref=master https://git.cs.vt.edu/api/v4/projects/9302/trigger/pipeline"
+
 docker-build-master:
   # Official docker image.
   image: docker:latest