DOC/REL: release notes v1.5.1

[tangkong]

Description

Quick bugfix release

Motivation and Context

New env new env

How Has This Been Tested?

N.A

Where Has This Been Documented?

This is docs

Pre-merge checklist

• Code works interactively
• Code contains descriptive docstrings, including context and API
• New/changed functions and methods are covered in the test suite where possible
• Code has been checked for threading issues (no blocking tasks in GUI thread)
• 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]

Jobs failed because pypi timed-out on lxml for whatever reason. rerunning, py3.9 reran fine