Updating trunk VERSION from 4105.0 to 4106.0

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

Change-Id: I3864aaa1d180fd52f9df862af5993edfa7f84f8b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2136841Reviewed-by: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#756535}

chrome/VERSION

 MAJOR=84
 MINOR=0
-BUILD=4105
+BUILD=4106
 PATCH=0