What version of octokit is used in this action? I'm trying to get the contents of a file in a repository with:

github.rest.repos.getContent({
  owner,
  repo,
  path,
  mediaType: {
    format: "raw+json"
  }
});

but it doesn't work. I always get the default response as if mediaType isn't set. Maybe this is not yet supported in the octokit client used in this action?

I looked at the debug information of the request and the headers don't include an Accept header. I expect the Accept header to be set to application/vnd.github.v3.raw+json