Update rate-limit.mdx

Author: DavidJKTofan

src/content/docs/workers/runtime-apis/bindings/rate-limit.mdx

@@ -16,7 +16,7 @@ You can use it to enforce:
 * Any combination of the above
 
 :::note
-The Rate Limiting API is available for all Workers plans.
+The Rate Limiting API is included with all Workers plans.
 :::
 
 The Rate Limiting API is backed by the same infrastructure that serves [rate limiting rules](/waf/rate-limiting-rules/).