added bgp info

Author: marciocloudflare

src/content/docs/network-interconnect/get-started.mdx

@@ -53,6 +53,7 @@ Consider the following service levels when planning your deployment:
 - **Observability**: There is no visibility of the interconnect config/status within the Cloudflare dashboard.
 - **Availability**: While network-resilient locations are designed to maintain connectivity during maintenance, single-homed locations can experience full service disruption.
 - **Backup Connectivity**: You are required to maintain alternative Internet connectivity as a backup for all CNI implementations.
+- **BGP**: Customers must have a BGP session established for Dataplane 1.0/1.1 to be operational.
 
 ## Location Alignment