Add myself (Yvonne Lai) to contributors.json
Pull request: https://github.com/WebKit/WebKit/pull/6422
*** Bug 247838 has been marked as a duplicate of this bug. ***
Committed 256802@main (2d006e3eedae): <https://commits.webkit.org/256802@main> Reviewed commits have been landed. Closing PR #6422 and removing active labels.
<rdar://problem/102487952>