fixed number

Author: omarshibli

README.mediawiki

@@ -729,7 +729,7 @@ Those proposing changes should consider that ultimately consent may rest with th
 | Informational
 | Draft
 |-
-| [[bip-0175.mediawiki|173]]
+| [[bip-0175.mediawiki|175]]
 | Applications
 | Pay to Contract Protocol
 | Omar Shibli, Nicholas Gregory