Merge pull request #397 from cannium/typo

Fix a typo in doc

libp2p.go

@@ -33,7 +33,7 @@ func ChainOptions(opts ...Option) Option {
 // - If no transport and listen addresses are provided, the node listens to
 // the multiaddresses "/ip4/0.0.0.0/tcp/0" and "/ip6/::/tcp/0";
 //
-// - If no transport options are provided, the node uses TPC and websocket
+// - If no transport options are provided, the node uses TCP and websocket
 // transport protocols;
 //
 // - If no multiplexer configuration is provided, the node is configured by