Updating trunk VERSION from 5785.0 to 5786.0

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

Change-Id: I1506b5fb710e66b8713a44f3d9242896cc18aa07
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4551100
Bot-Commit: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1146934}

chrome/VERSION

@@ -1,4 +1,4 @@
 MAJOR=115
 MINOR=0
-BUILD=5785
+BUILD=5786
 PATCH=0