Updating trunk VERSION from 3961.0 to 3962.0

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

Change-Id: Ib4f721bb596ec50d85bff4c026049d979c85699a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1900747Reviewed-by: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#712883}

chrome/VERSION

 MAJOR=80
 MINOR=0
-BUILD=3961
+BUILD=3962
 PATCH=0