docs: merge example links: Peer and Content Routing (#285)

Author: mtojek

examples/README.md

@@ -10,8 +10,7 @@ Let us know if you find any issue or if you want to contribute and add a new tut
 - [Protocol and Stream Muxing](./protocol-and-stream-muxing)
 - [Encrypted Communications](./encrypted-communications)
 - [Discovery Mechanisms](./discovery-mechanisms)
-- [Peer Routing](./peer-and-content-routing)
-- [Content Routing](./peer-and-content-routing)
+- [Peer and Content Routing](./peer-and-content-routing)
 - [PubSub](./pubsub)
 - [NAT Traversal](./nat-traversal)
 - Circuit Relay (future)