[w3c/webauthn] 9c7d00: Fix typo (thanks Travis!)

  Branch: refs/heads/vgb-modular-attestation
  Home:   https://github.com/w3c/webauthn
  Commit: 9c7d00d029d4e233913fd20e93f3fd80aa27b67a
      https://github.com/w3c/webauthn/commit/9c7d00d029d4e233913fd20e93f3fd80aa27b67a
  Author: Vijay Bharadwaj <vijaybh@users.noreply.github.com>
  Date:   2016-08-10 (Wed, 10 Aug 2016)

  Changed paths:
    M index.bs

  Log Message:
  -----------
  Fix typo (thanks Travis!)