Updating trunk VERSION from 4088.0 to 4089.0

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

Change-Id: I9134b9a8b8313901d256f1deab42c3f2f2ba76fd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2107906Reviewed-by: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#751221}

chrome/VERSION

 MAJOR=83
 MINOR=0
-BUILD=4088
+BUILD=4089
 PATCH=0