Run dprint in copilot-setup-steps to prevent network blocking error (#1269)

Author: jakebailey

.github/workflows/copilot-setup-steps.yml

@@ -26,3 +26,5 @@ jobs:
           cache-name: copilot-setup-steps
       - run: npm i -g @playwright/mcp@0.0.28
       - run: npm ci
+      # pull dprint caches before network access is blocked
+      - run: npx hereby check:format || true