Fix broken link (#299)

This PR includes the following:

- Fix broken link
`https://www.postman.com/use-cases/api-testing-automation/` by replacing
it with `https://www.postman.com/`, see
https://github.com/NHSDigital/software-engineering-quality-framework/actions/runs/5210436600/jobs/9401513578
- Auto formatting of the Quality Check table done by the VScode Markdown
plugin `yzhang.markdown-all-in-one`


![image](https://github.com/NHSDigital/software-engineering-quality-framework/assets/499338/a5f7ac75-d138-4a13-bdf0-67a433e81dec)

Author: stefaniuk