Add timothygu@ to //url/OWNERS

Change-Id: I4fb0dce858e3a2e579b62b3e45ecf2f8153c8437
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3180021
Commit-Queue: Daniel Cheng <dcheng@chromium.org>
Commit-Queue: Mike West <mkwst@chromium.org>
Auto-Submit: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Mike West <mkwst@chromium.org>
Cr-Commit-Position: refs/heads/main@{#924661}

diff --git a/url/OWNERS b/url/OWNERS
index 2ecc933..7a82807 100644
--- a/url/OWNERS
+++ b/url/OWNERS

@@ -3,4 +3,5 @@
 csharrison@chromium.org
 dcheng@chromium.org
 mkwst@chromium.org
+timothygu@chromium.org
 # NOTE: keep this in sync with lsc-owners-override@chromium.org owners