[maglev] Promote victorgomes as maglev owner

Bug: v8:7700
Change-Id: I5290b6af6158dece0d38b24bc80b887f67c2747b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3582921
Auto-Submit: Victor Gomes <victorgomes@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79942}

src/maglev/OWNERS

 leszeks@chromium.org
 jgruber@chromium.org
 verwaest@chromium.org
+victorgomes@chromium.org