Update Metadata Cache

Cr-Build-Url: https://cr-buildbucket.appspot.com/build/8695270127227385617
Change-Id: Id7b59ac480d5c063c59598587ce1e6f928e8c437
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/7267725
Bot-Commit: ChromeOS Prod (Robot) <chromeos-ci-prod@chromeos-bot.iam.gserviceaccount.com>