[w3c/webauthn] e59483: fix 864: added Note

  Branch: refs/heads/jeffh-fix-864-editorial
  Home:   https://github.com/w3c/webauthn
  Commit: e594834e267e8c943ee10c68d22464ab4b56f8b9
      https://github.com/w3c/webauthn/commit/e594834e267e8c943ee10c68d22464ab4b56f8b9
  Author: JeffH <Jeff.Hodges@PayPal.com>
  Date:   2018-07-06 (Fri, 06 Jul 2018)

  Changed paths:
    M index.bs

  Log Message:
  -----------
  fix 864: added Note



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