Ensure compliance with the PHA4GE Best Practices

[sage-wright]

This PR closes #407.

🗑️ This dev branch should be deleted after merging to main.

This PR only changes the README!

:microscope: Final Developer Checklist

• [ ] Code changes follow the style guide

🎯 Reviewer Checklist

• [ ] All impacted workflows/tasks have been tested on Terra with a different dataset than used for development
• [ ] All reviewer-suggested scenarios have been tested and any additional
• [ ] All changed results have been confirmed to be accurate
• [ ] All workflows/tasks impacted by change/s have been tested using a standard validation dataset to ensure no unintended change of functionality
• [ ] All code adheres to the style guide
• [ ] MD5 sums have been updated
• [ ] The PR author has addressed all comments

🗂️ Associated Documentation (to be completed by Theiagen developer)

• [ ] Relevant documentation on the Public Health Resources "PHB Main" has been updated
• [ ] Workflow diagrams have been updated to reflect changes