Merge pull request bitcoin#1617 from 1440000bytes/bip301

Fix bip number in specification

Author: jonatack

bip-0301.mediawiki

@@ -78,7 +78,7 @@ Bip301 makes this specialization-of-labor trustless on layer1. If Mary takes Sim
 ==Specification==
 
 
-Bip300 consists of two messages: "BMM Accept" and "BMM Request". These govern something called "h*".
+Bip301 consists of two messages: "BMM Accept" and "BMM Request". These govern something called "h*".
 
 So we will discuss: