Updating trunk VERSION from 4337.0 to 4338.0

# This is an automated release commit.
# Do not revert without consulting chrome-pmo@google.com.
NOAUTOREVERT=true
TBR=govind@chromium.org

Change-Id: Ib8b338ed98e027ac6799f27f2c17f3f7739e2a8b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2561052Reviewed-by: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#831247}

chrome/VERSION

 MAJOR=89
 MINOR=0
-BUILD=4337
+BUILD=4338
 PATCH=0