[CF4SaaS] Remove limits and ref to Page Rules from custom-metadata.mdx (#23715)

Author: ngayerie

src/content/docs/cloudflare-for-platforms/cloudflare-for-saas/domain-support/custom-metadata.mdx

@@ -9,7 +9,7 @@ description: Configure per-hostname settings such as URL rewriting and custom he
 
 import { Render, APIRequest, TypeScriptExample } from "~/components";
 
-You may wish to configure per-hostname (customer) settings beyond the scale of Page Rules or Rate Limiting, which have a maximum of 125 rules each.
+You may wish to configure per-hostname (customer) settings beyond the scale of Rules or Rate Limiting.
 
 To do this, you will first need to reach out to your account team to enable access to Custom Metadata. After configuring custom metadata, you can use it in the following ways: