What permissions are needed to allow a collaborator update the projects board?

Hello,

I have a public repository in an organization and want to manage an aspect with two contributors from the community in a project board. The users should be able to modify the board.

I know the project boards are connected with the permissions of the repo itself. However, I do not know, what exact permission is sufficient (triage, write, …) in order to allow them to work on the board.

I was not able to find this in the docs.

Thank you very much!

Christian