Updating trunk VERSION from 4211.0 to 4212.0

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

Change-Id: I7a91b5ee733c9b393b8ea3e53f177444c0ad9a3c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2316528Reviewed-by: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#791299}

chrome/VERSION

 MAJOR=86
 MINOR=0
-BUILD=4211
+BUILD=4212
 PATCH=0