How do I configure HotChocolate to generate non-nullable result in payload generated by convention?

I have a mutation method implemented as follows:

    public async Task<Project> ChangeProjectStatus(
        Guid projectId,
        ProjectStatus status
    ) {
        return ...<non-null result>...;
    }

The generated SDL looks as follows:

type CreateProjectPayload {
  project: Project
}

Is there a way to configure HotChocolate to generate a project field to be of type Project! rather than Project (nullable)? (using an OOB convention configured globally with .AddMutationConventions())