Add future reading section to client settings doc

Kate Osborn · Kate Osborn · commit ab19749452e2 · 2024-06-07T14:06:43.000-06:00
diff --git a/site/content/how-to/traffic-management/client-settings.md b/site/content/how-to/traffic-management/client-settings.md
@@ -276,3 +276,7 @@ spec:
     maxSize: "75" # sizes without a unit are bytes.
 EOF
 ```
+
+## Further Reading
+
+- [Custom policies]({{< relref "overview/custom-policies.md" >}}): learn about how NGINX Gateway Fabric custom policies work.
