Solve merge conflicts (probably due to cherry-picking) by choosing the pre-release version.
# Conflicts:
#   .gitlab/ci_pipelines/default.yml
#   .gitlab/ci_pipelines/install_stackspin.yml
#   .gitlab/ci_pipelines/upgrade_test.yml
#   Dockerfile
#   flux2/apps/zulip/zulip-values-configmap.yaml
#   install/install-stackspin.sh