maintainers: update matrix for toastal (#399282)

    githubId = 39011842;

  };

  toastal = {

    # preferred: xmpp = "toastal@toastal.in.th";

    email = "toastal+nix@posteo.net";

    matrix = "@toastal:mozilla.org";

    matrix = "@toastal:clan.lol";

    github = "toastal";

    githubId = 561087;

    name = "toastal";