Updating trunk VERSION from 4347.0 to 4348.0

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

Change-Id: Idb5238e67ed1145d8c3afb462f457bd84d608efb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2575011Reviewed-by: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#834055}

chrome/VERSION

 MAJOR=89
 MINOR=0
-BUILD=4347
+BUILD=4348
 PATCH=0