add tebbi@chromium.org to COMMON_OWNERS

Change-Id: I734aba6528bd23adca1998be52197f609c6c174e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3497351
Auto-Submit: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79403}

COMMON_OWNERS

@@ -26,6 +26,7 @@ omerkatz@chromium.org
 pthier@chromium.org
 syg@chromium.org
 szuend@chromium.org
+tebbi@chromium.org
 thibaudm@chromium.org
 vahl@chromium.org
 verwaest@chromium.org