[@scope] Mark scope-shadow.html as non-tentative
The relevant issue has been resolved, and the spec has been edited.
Change-Id: I218d98496e31d24e07a6a4e40bf0be4e6940c731
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5864290
Reviewed-by: Rune Lillesveen futhark@chromium.org
Auto-Submit: Anders Hartvoll Ruud andruud@chromium.org
Commit-Queue: Rune Lillesveen futhark@chromium.org
Cr-Commit-Position: refs/heads/main@{#1355808}