.gitlab-ci.yml: Don't duplicate job names

With duplicate job names only one of the duplicate will be run. This
prevented the review environments to be deployed.

.gitlab-ci.yml

@@ -48,7 +48,7 @@ deploy:
     - /^feature-[cw]\/.*$/
     - /^hotfix-[cw]\/.*$/
 
-deploy:
+deploy_prod:
   stage: deploy
   script:
     - ssh $PROD_CLIENT_SERVER "cd $PROD_CLIENT_PATH; git fetch ; git reset --hard origin/prod-client"