[w3c/webauthn] c4a30e: Change uses of acme.com to example.com (#814)

  Branch: refs/heads/master
  Home:   https://github.com/w3c/webauthn
  Commit: c4a30ee7ea99de0cdfc38ceecac5649fc0806a1c
      https://github.com/w3c/webauthn/commit/c4a30ee7ea99de0cdfc38ceecac5649fc0806a1c
  Author: Mike Jones <Michael.Jones@microsoft.com>
  Date:   2018-02-21 (Wed, 21 Feb 2018)

  Changed paths:
    M index.bs

  Log Message:
  -----------
  Change uses of acme.com to example.com (#814)