[w3c/webauthn] 45caac: Tpm attestation fields clarifications

  Branch: refs/heads/akshay-tpm-attestation-clarification
  Home:   https://github.com/w3c/webauthn
  Commit: 45caac2e822a06d52753f241cd688f1dd551092a
      https://github.com/w3c/webauthn/commit/45caac2e822a06d52753f241cd688f1dd551092a
  Author: Akshay Kumar <akshayku@corp.microsoft.com>
  Date:   2018-02-08 (Thu, 08 Feb 2018)

  Changed paths:
    M index.bs

  Log Message:
  -----------
  Tpm attestation fields clarifications