[DBSC] Update registration header to new format

Based on https://github.com/WICG/dbsc/issues/41 updating the
registration headers to be able to describe the algos in
uppercase.

Bug: 41495201
Change-Id: I5e3cd4cae84990d236c6b96187d8838692f86e67
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5581762


Reviewed-by: Adam Rice <ricea@chromium.org>
Reviewed-by: Lily Chen <chlily@chromium.org>
Commit-Queue: Kristian Monsen <kristianm@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1312621}