Bump expiration of Net.CertificateTransparency.SCTOrigin

I still find this to be a useful histogram, especially as discussions on the future of some methods aren't over yet.

Change-Id: I94d0c9b9135487231a06d20d904a04a9ac76df83
Fixed: 346342616
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5615199


Auto-Submit: Joe DeBlasio <jdeblasio@chromium.org>
Commit-Queue: David Schinazi <dschinazi@chromium.org>
Reviewed-by: David Schinazi <dschinazi@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1312957}