[#2120] Update RepoSense contributors in documentation

[georgetayqy]

Fixes #2120

Proposed commit message

The current About page on the RepoSense docs does not reflect the
updated list of developers working on RepoSense.

Let's move to update the list to more accurately reference the current
developers of RepoSense.

Other information

I'm not too sure what the start dates for everyone's contributions, so please do update me if I got it wrong!