Incrementing VERSION to 118.0.5973.1

Change-Id: Id6f35e25b78e755dde201cf7d0fd4da1fe471ad4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4815627
Bot-Commit: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/branch-heads/5973@{#2}
Cr-Branched-From: bd140e2-refs/heads/main@{#1188723}

chrome/VERSION

@@ -1,4 +1,4 @@
 MAJOR=118
 MINOR=0
 BUILD=5973
-PATCH=0
+PATCH=1