[webauthn] Pull Request: Match text for identical verification steps

nicksteele has just submitted a new pull request for https://github.com/w3c/webauthn:

== Match text for identical verification steps ==
When verifying the registration response, we use different text than the identical step in verifying assertion. The hash is also referred/linked as 'RP ID Hash'  in the registration step text, rather than being referred/linked as the more helpful `rpIdHash`.

See https://github.com/w3c/webauthn/pull/1119