Update CONTRIBUTING.md
Update CONTRIBUTING.md

Co-Authored-By: edalex-ian <4670ac7d3c7041f77fc95b6dc18a8fe9a623b8bb@users.noreply.github.com>
equella/Equella,equella/Equella,equella/Equella,equella/Equella,equella/Equella,equella/Equella,equella/Equella