[w3c/webauthn] 4bdb54: Json comma issue

  Branch: refs/heads/akshay-sig-clarification
  Home:   https://github.com/w3c/webauthn
  Commit: 4bdb54c658259502081e429fe7a1f4e7c5a64385
      https://github.com/w3c/webauthn/commit/4bdb54c658259502081e429fe7a1f4e7c5a64385
  Author: Akshay Kumar <akshayku@corp.microsoft.com>
  Date:   2018-02-20 (Tue, 20 Feb 2018)

  Changed paths:
    M index.bs

  Log Message:
  -----------
  Json comma issue