Updating trunk VERSION from 4980.0 to 4981.0

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

Change-Id: Ia72bf4f63a6dcb57106adf035d0358a3dc87a6d7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3567062
Bot-Commit: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#988258}

chrome/VERSION

@@ -1,4 +1,4 @@
 MAJOR=102
 MINOR=0
-BUILD=4980
+BUILD=4981
 PATCH=0