doc: cleanup release notes

No-try: true
Change-Id: Ice2803974c7451aff200c75a609414cf9f0a17fe
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/245374
Auto-Submit: Hal Canary <halcanary@google.com>
Reviewed-by: Heather Miller <hcm@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
1 file changed