Update Metadata Cache

Cr-Build-Url: https://cr-buildbucket.appspot.com/build/8697845354342449969
Change-Id: Id22e659ac854bf61b877b61cae9557bd74e99d27
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/7168205
Bot-Commit: ChromeOS Prod (Robot) <chromeos-ci-prod@chromeos-bot.iam.gserviceaccount.com>