added optional to title

Author: marciocloudflare

src/content/docs/magic-transit/how-to/advertise-prefixes.mdx

@@ -69,7 +69,7 @@ You can only delete a prefix with an **Unapproved** status. To delete prefixes w
 1. From the **IP Prefixes** tab, locate the prefix you want to modify and select **Delete**.
 2. Confirm your choice from the modal by selecting **Delete**.
 
-## Border Gateway Protocol (BGP) control for advertisements
+## Border Gateway Protocol (BGP) control for advertisements (optional)
 
 Optionally, you can use BGP to control the advertisement status of your prefix — advertised or withdrawn — from Cloudflare's global network for on-demand deployment scenarios. BGP Control works by establishing BGP sessions to Cloudflare's globally distributed Route Reflectors, which will initiate propagation of your prefix advertisement across Cloudflare's global network.