Incrementing VERSION to 123.0.6312.59

Change-Id: Ifc738cfc13ef5779cce8608000cad6d27c051e74
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5378381
Bot-Commit: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/branch-heads/6312_46@{chromium#4}
Cr-Branched-From: 29781e6-refs/branch-heads/6312@{#559}
Cr-Branched-From: 6711dcd-refs/heads/main@{#1262506}