Link to permanent PR of reference implementation

analogue to bitcoin@ecfb7eb

Author: ysangkok

bip-0141.mediawiki

@@ -287,7 +287,7 @@ Special thanks to Gregory Maxwell for originating many of the ideas in this BIP
 
 == Reference Implementation ==
 
-https://github.com/bitcoin/bitcoin/pull/7910
+https://github.com/bitcoin/bitcoin/pull/8149
 
 == References ==