gitlab-ci: fix app publication

For apertis/* branches, only the runtime is published to the main 
flatpak repository, while the application was still published to the 
test repo.

This commit ensures both the runtime and app get published to the right 
place.

Signed-off-by: Arnaud Ferraris <arnaud.ferraris@collabora.com>

.gitlab-ci.yml

@@ -145,7 +145,7 @@ prepare-build-env:
   script:
     - |
       case "$CI_COMMIT_REF_NAME" in
-        master)
+        master|apertis/*)
           export UPLOAD_ROOT=${upload_root_main}/app
           export REMOTE_URL=${remote_url_main}/app
           ;;