Updating trunk VERSION from 5448.0 to 5449.0

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

Change-Id: I60040807214a3014f32dd2cf8c035fcbe04698e4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4060900
Bot-Commit: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1076887}