Incrementing VERSION to 74.0.3729.10

TBR=benmason@chromium.org

Change-Id: If480b0d6581226899f40295d7a8ec16bcc2e7de7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1518560
Reviewed-by: chrome-release-bot@chromium.org <chrome-release-bot@chromium.org>
Cr-Commit-Position: refs/branch-heads/3729@{#73}
Cr-Branched-From: d4a8972-refs/heads/master@{#638880}

Author: chrome-release-bot

chrome/VERSION

@@ -1,4 +1,4 @@
 MAJOR=74
 MINOR=0
 BUILD=3729
-PATCH=9
+PATCH=10