[w3c/webauthn] 488ff0: add link to 2nd CR version

  Branch: refs/heads/samuelweiler-patch-2
  Home:   https://github.com/w3c/webauthn
  Commit: 488ff04043ceb6188f2499d659101bade56652d1
      https://github.com/w3c/webauthn/commit/488ff04043ceb6188f2499d659101bade56652d1
  Author: Samuel Weiler <weiler@w3.org>
  Date:   2018-08-08 (Wed, 08 Aug 2018)

  Changed paths:
    M index.bs

  Log Message:
  -----------
  add link to 2nd CR version

to resolve https://github.com/w3c/webauthn/issues/1028



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