Incrementing VERSION to 116.0.5845.78

Change-Id: Id69daf616e9e2e7f8fb3fe5c748f97ba61ea0fc7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4761685
Bot-Commit: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/branch-heads/5845@{#1278}
Cr-Branched-From: 5a5dff6-refs/heads/main@{#1160321}

chrome/VERSION

@@ -1,4 +1,4 @@
 MAJOR=116
 MINOR=0
 BUILD=5845
-PATCH=77
+PATCH=78