Incrementing VERSION to 69.0.3497.12

[email protected]

Change-Id: I49e78199a3b3e54a4424ad73a10d39ff46a4e225
Reviewed-on: https://chromium-review.googlesource.com/1149043
Reviewed-by: [email protected] <[email protected]>
Cr-Commit-Position: refs/branch-heads/3497@{#54}
Cr-Branched-From: 271eaf5-refs/heads/master@{#576753}

Author: chrome-release-bot

chrome/VERSION

@@ -1,4 +1,4 @@
 MAJOR=69
 MINOR=0
 BUILD=3497
-PATCH=11
+PATCH=12