Add myself back to blink/public/OWNERS

I used to be an OWNER here, but didn't used to have much time for CRs
and so let this lapse*. Now that I have time for CRs again, adding back
after getting LGTMs from existing OWNERS.

*https://chromium-review.googlesource.com/c/chromium/src/+/2928043/8/third_party/blink/public/OWNERS)

Change-Id: I68da1fd1475c536eeb9d78195cb8b28af05a0f2e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5132538
Reviewed-by: danakj <danakj@chromium.org>
Auto-Submit: Rick Byers <rbyers@chromium.org>
Commit-Queue: danakj <danakj@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1242040}