fix typos

communications_protocol.asciidoc

@@ -11,12 +11,12 @@ This protocol framework is also used by Whatsapp and Wireguard and is very well
 If you want to learn more we suggest you check out http://www.noiseprotocol.org/
 ====
 
-=== Ligtning Messages
+=== Lightning Messages
 
-Each Ligtning Message contains 2 bytes indicating the *type* of message, and a variable-length *payload*.
+Each Lightning Message contains 2 bytes indicating the *type* of message, and a variable-length *payload*.
 A *payload* needs to be interpreted according the *type*.
 
-A Ligtning Message falls into one of the following groups:
+A Lightning Message falls into one of the following groups:
 
 [cols="3,3,10",options="header"]
 |=======