[ci] fix deploy jobs not being in deploy stage

.gitlab-ci.yml

@@ -14,7 +14,7 @@ build centos:
     - docker build $OPTS --pull -t "${CI_REGISTRY}/${CI_PROJECT_PATH,,}:${CI_COMMIT_REF_NAME}-centos" -f centos/Dockerfile centos
 
 deploy centos:
-  stage: build
+  stage: deploy
   tags: [ linux, shell ]
   only:
     - master
@@ -37,7 +37,7 @@ build ubuntu:
     - docker build $OPTS --pull -t "${CI_REGISTRY}/${CI_PROJECT_PATH,,}:${CI_COMMIT_REF_NAME}-ubuntu" -f ubuntu/Dockerfile ubuntu
 
 deploy ubuntu:
-  stage: build
+  stage: deploy
   tags: [ linux, shell ]
   only:
     - master
@@ -67,7 +67,7 @@ build windows:
     - docker build --memory 15G -t "${image_name}:${CI_COMMIT_REF_NAME}-cuda-devel-windows" -f windows/cuda-devel/Dockerfile windows/cuda-devel
 
 deploy windows:
-  stage: build
+  stage: deploy
   tags: [ windows, shell ]
   only:
     - master