DOC/REL: v1.20.0

[ZLLentz]

Description

Release notes for small tag with new cli feature.

Motivation and Context

I think this is ready in time to be included in the early next week conda env and it seems to fix issues in prod.

How Has This Been Tested?

Interactively + unit tests

Where Has This Been Documented?

here

Pre-merge checklist

• Code works interactively (a real hutch config file can be loaded)
• Code contains descriptive docstrings, including context and API
• New/changed functions and methods are covered in the test suite where possible
• Test suite passes locally
• Test suite passes on GitHub Actions
• Ran docs/pre-release-notes.sh and created a pre-release documentation page
• Pre-release docs include context, functional descriptions, and contributors as appropriate

[tangkong]

whoops my bad I forgot to remove the pre-rel