chore: update MAINTAINERS

[matthisholleville]

Closes #

📑 Description

add matthisholleville as a maintainer

✅ Checks

• [x] My pull request adheres to the code style of this project
• [x] My code requires changes to the documentation
• [x] I have updated the documentation as required
• [ ] All the tests have passed

ℹ Additional Information

[AlexsJones]

Welcome :)