Incrementing VERSION to 101.0.4951.51

Change-Id: I8ada7ff9544212cc89208739d6c1c3c09702917b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3612502
Bot-Commit: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/branch-heads/4951@{#1103}
Cr-Branched-From: 27de622-refs/heads/main@{#982481}

chrome/VERSION

@@ -1,4 +1,4 @@
 MAJOR=101
 MINOR=0
 BUILD=4951
-PATCH=50
+PATCH=51