Set 'zip_tutorials' job stage to 'build'

Moved the 'zip_tutorials' job from the 'release' stage to the 'build' stage in the GitLab CI pipeline. This ensures proper alignment with the intended pipeline zip_tutorials>create_release

.gitlab-ci.yml

@@ -81,7 +81,7 @@ coverage:
       allow_failure: true
 
 zip_tutorials:
-  stage: release
+  stage: build
   tags:
     - linux
     - large