SIGN IN SIGN UP

Update comment to point to culpable commit (#17896)

This PR updates the comment added in #17893 to reference the commit that
was identified by `git bisect`.

Release Notes:

- N/A
M
Marshall Bowers committed
b48c2c5846e6e4ed11380786143f37e99f8a5a48
Parent: f376932
Committed by GitHub <noreply@github.com> on 9/16/2024, 5:41:31 PM