[w3c/webauthn] d054b3: fix misspelling

  Branch: refs/heads/issue-1024-fido-u2f-attca
  Home:   https://github.com/w3c/webauthn
  Commit: d054b3f1227ac1bfb5e634a047d688c761f5ad79
      https://github.com/w3c/webauthn/commit/d054b3f1227ac1bfb5e634a047d688c761f5ad79
  Author: JeffH <Jeff.Hodges@KingsMountain.com>
  Date:   2018-09-17 (Mon, 17 Sep 2018)

  Changed paths:
    M index.bs

  Log Message:
  -----------
  fix misspelling



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