Updating trunk VERSION from 3964.0 to 3965.0

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

Change-Id: I3d538948fc753f31601a42894448f66d00d0003f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1906342Reviewed-by: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#714080}

chrome/VERSION

 MAJOR=80
 MINOR=0
-BUILD=3964
+BUILD=3965
 PATCH=0