Browser/OS testing guidance broken links #358

The links referenced in section:
https://github.com/NHSDigital/software-engineering-quality-framework/blob/main/practices/testing.md#browseros-testing-guidance

Link to nhsarchitecture boards rather than a defined list of browsers and devices. I've had a look through the boards but couldn't find anything relevant.

Suggestion

Update this section to point to GOV UK service manual guidance which NHS service standard builds upon.