Fix origin of KSAnnotation #2424

✅ All contributors are covered under a CLA with Google

See https://cla.developers.google.com/ for more info about Google's Contributor License Agreement (CLA).

ℹ️ Googlers: Go here to view more details and manage scans for this pull request.

@ting-yuan

The following contributors were found for this pull request:

✅ 818df4e Author: @ting-yuan <la***o@google.com>

(Only the first commit for a unique contributor is listed.)