Updating trunk VERSION from 3775.0 to 3776.0

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

Change-Id: I2aa8ad03a6f9b0a03afc740d61223ac9f5f10a5f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1580470Reviewed-by: chrome-release-bot@chromium.org <chrome-release-bot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#653480}

chrome/VERSION

 MAJOR=76
 MINOR=0
-BUILD=3775
+BUILD=3776
 PATCH=0