Fix Type in go integration (#5132)

Fix Typo in second example
From svc.ServeTLSConfig() to svc.ServerTLSConfig()

website/source/docs/connect/native/go.html.md

@@ -104,7 +104,7 @@ func main() {
   defer svc.Close()
 
   // Creating an HTTP server that serves via Connect
-  listener, _ := tls.Listen("tcp", ":8080", svc.ServeTLSConfig())
+  listener, _ := tls.Listen("tcp", ":8080", svc.ServerTLSConfig())
   defer listener.Close()
 
   // Accept