Update CHANGELOG.md

[alexdlaird]

Description

A clear and concise description of what was changed.

Fixes # (issue number)

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a schema change
• This change requires a documentation update

Testing Done

A clear and concise description of the new tests added to validate the change as well as any manual testing done.

Checklist

• I have added tests that prove my change works as expected, and make test passes with no new errors or warnings
• I have run make check to ensure no new errors or warnings
• I have updated the docs, if applicable, and run make docs to ensure no new errors or warnings
• I have performed a self-review of my own code
• I have commented my code in particularly hard-to-understand areas