[w3c/webauthn] ed234c: polish

  Branch: refs/heads/jeffh-fix-1557-accessibility-cons
  Home:   https://github.com/w3c/webauthn
  Commit: ed234cc6214ebd46b0ece379030ec36ea989f9e3
      https://github.com/w3c/webauthn/commit/ed234cc6214ebd46b0ece379030ec36ea989f9e3
  Author: JeffH <jdhodges@google.com>
  Date:   2021-02-11 (Thu, 11 Feb 2021)

  Changed paths:
    M index.bs

  Log Message:
  -----------
  polish