[webauthn] new commits pushed by vijaybh

The following commits were just pushed by vijaybh to 
https://github.com/w3c/webauthn:

* Fix two typos and some locally anomalous line lengths

Typos - weird character in "Subsequently" on line 84, "user
verification" missing on line 104 (old) / 102 (new).
  by Vijay Bharadwaj
https://github.com/w3c/webauthn/commit/609ad61294178bf4bcaeca3ac9a0347f3977abc1