Update gep-1856.md

To resolve suggestion to change from "a resource" to "an endpoint" from @shaneutt

Author: quangnguyen101

geps/gep-1856.md

@@ -4,7 +4,7 @@ Issue: [#1856](https://github.com/kubernetes-sigs/gateway-api/issues/1856)
 Status: Provisional
 
 ## TLDR
-Egress traffic is any traffic that originates inside a Kubernetes cluster that is bound for a resource outside of the cluster. Egress Traffic in Kubernetes is a common use case for Service Providers to provision outbound traffic that requires a Gateway resource to provide Source Network Address Translation (SNAT) capabilities.
+Egress traffic is any traffic that originates inside a Kubernetes cluster that is bound for an endpoint outside of the cluster. Egress Traffic in Kubernetes is a common use case for Service Providers to provision outbound traffic that requires a Gateway resource to provide Source Network Address Translation (SNAT) capabilities.
 
 This GEP intends to provide formal rules for how an application can reach an endpoint outside of the cluster via a Gateway. The egress path is protocol agnostic and the Gateway can be connected to multiple external networks.