fix : missing stage & upd ref for gitlab yml files

.gitlab-ci.yml

@@ -9,10 +9,11 @@ stages:
   - test
   - coverage
   - release
+  - deploy
 
 include:
   - project: 'eclipse/aidge/gitlab_shared_files' 
-    ref: 'feat/release_pip'
+    ref: 'main'
     file: 
       # choose which jobs to run by including the corresponding files.
       - '.gitlab/ci/ubuntu_python.gitlab-ci.yml'