fix(cicd): update V2.0 job

.gitlab-ci.yml

@@ -36,6 +36,7 @@ build_branch:
   image: ${CI_DEPENDENCY_PROXY_DIRECT_GROUP_IMAGE_PREFIX}/docker:18.09
   stage: build
   only:
+    - V2.0
     - merge_requests
   script:
     - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY