Updating trunk VERSION from 3960.0 to 3961.0

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

Change-Id: Iaf90f1afcc14e22a8695b22f00b9b2e6b1c5d2a5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1897807Reviewed-by: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#712432}

chrome/VERSION

 MAJOR=80
 MINOR=0
-BUILD=3960
+BUILD=3961
 PATCH=0