Incrementing VERSION to 102.0.4974.3

Change-Id: I2ae6ee07870357d28b475d9a140608e0760ec63a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3560916
Bot-Commit: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/branch-heads/4974@{#10}
Cr-Branched-From: 89f4767-refs/heads/main@{#986924}

chrome/VERSION

@@ -1,4 +1,4 @@
 MAJOR=102
 MINOR=0
 BUILD=4974
-PATCH=2
+PATCH=3