Fix broken WebAuthn test noted in https://bugs.webkit.org/show_bug.cgi?id=274766
<rdar://problem/128904316>
Pull request: https://github.com/WebKit/WebKit/pull/29197
Committed 279709@main (a3f169032e63): <https://commits.webkit.org/279709@main> Reviewed commits have been landed. Closing PR #29197 and removing active labels.