Add version_update_mask to packit configuration

.packit.yaml

@@ -6,8 +6,10 @@ specfile_path: python-APScheduler.spec
 upstream_package_name: APScheduler
 downstream_package_name: python-APScheduler
 upstream_project_url: https://github.com/agronholm/apscheduler
-
+version_update_mask: '\d+\.\d+\.'
 upstream_tag_exclude: "^4.[0-9].[0-9]a"  # exclude version 4 alpha releases
+
+packit_instances: ["stg"]
  
 jobs:
   - job: copr_build
@@ -19,7 +21,6 @@ jobs:
 
   - job: pull_from_upstream
     trigger: release
-    packit_instances: ["prod", "stg"]
     dist_git_branches:
       - fedora-all