Incrementing VERSION to 73.0.3683.20

TBR=cmasso@chromium.org

Change-Id: I487a0d5d1dc368af0204c3552de88ca4e3a37b1c
Reviewed-on: https://chromium-review.googlesource.com/c/1453797
Reviewed-by: chrome-release-bot@chromium.org <chrome-release-bot@chromium.org>
Cr-Commit-Position: refs/branch-heads/3683@{#191}
Cr-Branched-From: e51029943e0a38dd794b73caaf6373d5496ae783-refs/heads/master@{#625896}
1 file changed