[w3c/webauthn] 3307e5: add link to WD-webauthn-20180315 (WD-09)

  Branch: refs/heads/jeffh-add-wd-09-link
  Home:   https://github.com/w3c/webauthn
  Commit: 3307e5765e2d4b3db733e68b608ee7dba0a2f1e8
      https://github.com/w3c/webauthn/commit/3307e5765e2d4b3db733e68b608ee7dba0a2f1e8
  Author: JeffH <Jeff.Hodges@PayPal.com>
  Date:   2018-03-15 (Thu, 15 Mar 2018)

  Changed paths:
    M index.bs

  Log Message:
  -----------
  add link to WD-webauthn-20180315 (WD-09)