[w3c/webauthn] 90593b: fixes inspired by emlun's review

  Branch: refs/heads/jeffh-fix-1658-device-bound-key-extension
  Home:   https://github.com/w3c/webauthn
  Commit: 90593b9cc35d3c5deb3072fdb4c5c80ab10b7ded
      https://github.com/w3c/webauthn/commit/90593b9cc35d3c5deb3072fdb4c5c80ab10b7ded
  Author: JeffH <jdhodges@google.com>
  Date:   2021-11-12 (Fri, 12 Nov 2021)

  Changed paths:
    M index.bs

  Log Message:
  -----------
  fixes inspired by emlun's review


  Commit: d0bef3392ab9e8d57aff1b053c44c4c56f57ce1b
      https://github.com/w3c/webauthn/commit/d0bef3392ab9e8d57aff1b053c44c4c56f57ce1b
  Author: JeffH <jdhodges@google.com>
  Date:   2021-11-12 (Fri, 12 Nov 2021)

  Changed paths:
    M index.bs

  Log Message:
  -----------
  apply and merge emlun's review suggestions, thx!


Compare: https://github.com/w3c/webauthn/compare/7c3e2e8d4351...d0bef3392ab9