v3.0.9

Update changelog for impending release of v3.0.9 (#105)

## Description of the change

> Write a brief description of your change here. 

## Checklist

- [ ] I performed a self-review of my code
- [ ] I manually tested my code change (please list details in description)
- [ ] I added unit tests 
- [ ] I updated the changelog
- [ ] I updated the public facing docs