[DMARC] Wrap sentence in note (#24624)

Author: Maddy-Cloudflare

src/content/docs/dmarc-management/index.mdx

@@ -22,9 +22,11 @@ Stop brand impersonation.
 
 Cloudflare DMARC Management helps you track every source that is sending emails from your domain and review [Domain-based Message Authentication Reporting and Conformance (DMARC)](https://www.cloudflare.com/learning/dns/dns-records/dns-dmarc-record/) reports for each source. DMARC reports will help you understand if messages sent from your domain are passing DMARC authentication, [DomainKeys Identified Mail (DKIM)](https://www.cloudflare.com/learning/dns/dns-records/dns-dkim-record/) authentication, and [Sender Policy Framework (SPF)](https://www.cloudflare.com/learning/dns/dns-records/dns-spf-record/) policies.
 
+:::note
 DMARC Management is available to all Cloudflare customers with [Cloudflare DNS](/dns/).
+:::
 
-***
+---
 
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