Update Metadata Cache

Cr-Build-Url: https://cr-buildbucket.appspot.com/build/8697650172323641233
Change-Id: I4b93698313a6dc39e4d6c5cc15ea5fb1071aaea1
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/7180524
Bot-Commit: ChromeOS Prod (Robot) <chromeos-ci-prod@chromeos-bot.iam.gserviceaccount.com>