Fix allcontributors bot for AutSPACEs repo

[lottycoupat]

Describe the bug

Currently the contributor bot that adds users to our contributor list is not working on the AutSPACEs github repo.

For reference, it is working on our project management repository as you can see here.

Expected behaviour

1. Go to issue Complete ethics form AutisticaCitizenScience#1
2. Comment "@allcontributors please add"
3. Contributor bot should reply automatically having added the person as a contributor in a Pull Request
4. User reviews the PR, accepts and merges

Currently, steps 3 and 4 are not working.

[mridubhatnagar]

@lottycoupat just wanted to confirm if it is @allcontributors or @all-contributors?

[SuziQpid]

Could it therefore be a syntax issue that's easily corrected. Apologies if l've used wrong term.

[gedankenstuecke]

This worked on this repo when I used it recently, it only doesn't like adding multiple contributors in one go.