[w3c/webauthn] 31ddb2: Fix uvm 368 (#675)

  Branch: refs/heads/master
  Home:   https://github.com/w3c/webauthn
  Commit: 31ddb22449a62bcb05b901234fb29a80281953a6
      https://github.com/w3c/webauthn/commit/31ddb22449a62bcb05b901234fb29a80281953a6
  Author: Rolf Lindemann <rolf.lindemann@gmx.net>
  Date:   2017-11-09 (Thu, 09 Nov 2017)

  Changed paths:
    M index.bs

  Log Message:
  -----------
  Fix uvm 368 (#675)

* fix copy and paste error

* improve wording