chore(deps): bump dawidd6/action-download-artifact from 12 to 21 (#8959)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/update-health-dashboard.yml

@@ -27,7 +27,7 @@ jobs:
     
     steps:
       - name: 'Download previous metrics'
-        uses: dawidd6/action-download-artifact@0bd50d53a6d7fb5cb921e607957e9cc12b4ce392  # v12
+        uses: dawidd6/action-download-artifact@b6e2e70617bc3265edd6dab6c906732b2f1ae151  # v21
         with:
           name: health-metrics
           path: .