maintainers: update dump_stack (#351580)

    github = "jollheef";

    githubId = 1749762;

    name = "Mikhail Klementev";

    keys = [ { fingerprint = "5DD7 C6F6 0630 F08E DAE7  4711 1525 585D 1B43 C62A"; } ];

    keys = [

      { fingerprint = "5AC8 C9A1 68C7 9451 1A91  2295 C990 5BA7 2B5E 02BB"; }

      { fingerprint = "5DD7 C6F6 0630 F08E DAE7  4711 1525 585D 1B43 C62A"; }

    ];

  };

  dunxen = {

    email = "git@dunxen.dev";