Use developer heading in favour of tech lead - thanks @dznz for the idea

Hey @dznz, I saw your usage of the template on https://github.com/3months/surgeons/ and thought you had a cool idea, combining the developer and project tech lead sections. Have updated the template and the original readme to reflect this change.

Also added the two projects to the list of projects using the template now
This is temporary, as we are currently in a weird phase of the project where we will need to keep master the same until the redevelopments of the site are complete and they are ready to go live.