Merge branch 'no_empty_line' into 'master'

fix: do not create empty newlines when inserting YAML

See merge request https://gitlab.com/gitlab-org/cluster-integration/auto-deploy-image/-/merge_requests/365



Merged-by: João Alexandre Cunha <j.a.cunha@gmail.com>
Approved-by: Taka Nishida <tnishida@gitlab.com>
Approved-by: João Alexandre Cunha <j.a.cunha@gmail.com>
Reviewed-by: João Alexandre Cunha <j.a.cunha@gmail.com>
Co-authored-by: Martin Schurz <Martin.Schurz@telekom.de>