Update Metadata Cache

Cr-Build-Url: https://cr-buildbucket.appspot.com/build/8695197539430737953
Change-Id: I6f24b1452588b86bedadb444746ecb420995b1af
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/7271291
Bot-Commit: ChromeOS Prod (Robot) <chromeos-ci-prod@chromeos-bot.iam.gserviceaccount.com>