Update error-429.mdx

SPM-2107

Author: zeinjaber

src/content/docs/support/troubleshooting/http-status-codes/4xx-client-error/error-429.mdx

@@ -16,6 +16,12 @@ For more details, refer to [RFC 6585](https://tools.ietf.org/html/rfc6585).
 
 Servers use this status code to prevent excessive API requests from overloading the system. For example, a client making repeated API calls within a short time frame may trigger a 429 response. Websites or services may impose rate limits to manage traffic spikes or prevent abuse, temporarily blocking excessive requests from users.
 
+### R2 Managed Public Buckets
+
+Cloudflare applies rate limiting to requests for R2 managed public buckets accessed via r2.dev. This helps protect customers from abuse and overuse of public buckets.
+
+For more details, refer to [Rate limiting on managed public buckets through r2.dev](https://developers.cloudflare.com/r2/platform/limits/#rate-limiting-on-managed-public-buckets-through-r2dev).
+
 ### Cloudflare-specific information
 
 - **Cloudflare API limits**