Update .gitlab-ci.yml. Branch name fix

.gitlab-ci.yml

@@ -39,7 +39,7 @@ docker_php_sf_70:
       - pushes
       - tags
     variables:
-      - $CI_COMMIT_REF_NAME == "gitlab-ci"
+      - $CI_COMMIT_REF_NAME == "master"
 
 docker_php_sf_71:
   stage: build
@@ -55,4 +55,4 @@ docker_php_sf_71:
       - pushes
       - tags
     variables:
-      - $CI_COMMIT_REF_NAME == "gitlab-ci"
+      - $CI_COMMIT_REF_NAME == "master"