Update rate limit advice for high-volume use cases

Author: edgtz

website/i18n/en/docusaurus-plugin-content-docs/current/getting-started/rate-limits.mdx

@@ -84,4 +84,4 @@ Include retries with backoff and jitter, and always honor `Retry-After`.
 
 - Include and preserve `X-Facturapi-Log-Id` in your observability stack to correlate incidents.
 - Add alerts for `429` rate and p95/p99 latency.
-- If your integration needs higher limits, contact support to increase them for your organization.
+- For high-volume use cases, you can contact support to review your integration and evaluate available options.