fix(pgw): default route

Author: RoRoJ

pages/public-gateways/concepts.mdx

@@ -22,7 +22,7 @@ Allowed IPs is a feature of [SSH bastion](#ssh-bastion). It allows you to specif
 
 ## Default route
 
-When you attach a Public Gateway to a Private Network, you can choose to have it advertise a default route to other attached resources. This means that when the IP destination address for a packet is not known on the Private Network or elsewhere within the VPC, the packet is routed through the Public Gateway, enabling it to find the public internet.
+When you attach a Public Gateway to a Private Network, you can choose to have it advertise a default route to other attached resources. This means that when the IP destination address for a packet is not known on the Private Network or elsewhere within the VPC, the packet is routed through the Public Gateway, enabling it to find the public internet. The default route is propagated through DHCP.
 
 By default, the scope of a default route is limited to the Private Network the Public Gateway is directly attached to. However, you also have the option to enable each of your Private Networks to receive advertisements of **all** default routes throughout the entire VPC. This includes routes towards all Public Gateways advertising a default route, as well as any custom-created default routes.