allow yaml-update promotion step to create keys when missing #5299
Description
Checklist
- I've searched the issue queue to verify this is not a duplicate feature request.
- I've pasted the output of
kargo version, if applicable. - I've pasted logs, if applicable.
Proposed Feature
yaml-update promotion step is now (v1.8.0) able to update keys that are present in yaml document, but cannot create a new ones, when they are missing.
Motivation
I would like to be able to include metadata from promotion like freight name in the yaml document even though the yaml doesn't contain prepared placeholder for it (thus reducing some boilerplate, when configuring source yaml document first time).