Updating trunk VERSION from 6155.0 to 6156.0

* This is an automated release commit.
* Do not revert without consulting chrome-pmo@google.com.
NOAUTOREVERT=true

Change-Id: I97c1283595585162fa7a045abf97e0dcae84de11
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5069416
Bot-Commit: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1230425}
diff --git a/chrome/VERSION b/chrome/VERSION
index 4f8613fe..d610cdc 100644
--- a/chrome/VERSION
+++ b/chrome/VERSION
@@ -1,4 +1,4 @@
 MAJOR=121
 MINOR=0
-BUILD=6155
+BUILD=6156
 PATCH=0