ci: restore deploy pipeline — remove invalid continue-on-error on smoke job

Same 0-job-failure fix as prautoblogger #147 / prcore #14.

Agent-Session: cto restore-deploy-org-sweep

.github/workflows/deploy.yml

@@ -80,7 +80,6 @@ jobs:
   smoke:
     name: Smoke tests (staging)
     needs: deploy-staging
-    continue-on-error: true
     uses: peptiderepo/peptide-e2e/.github/workflows/smoke.yml@main
     secrets:
       STAGING_WP_ADMIN_USER: ${{ secrets.STAGING_WP_ADMIN_USER }}