fix readme (#170)

Author: Jim8y

README.mediawiki

@@ -99,15 +99,13 @@ First review [[nep-1.mediawiki|NEP-1]]. Then clone the repository and add your N
 | Informational
 | Accepted
 |-
-|
 | [[nep-23.mediawiki|23]]
 | JSON-RPC error handling and codes
 | Anna Shaleva, Roman Khimov
 | Informational
 | Accepted
 |-
-| 
-| [https://github.com/neo-project/proposals/pull/155 24]
+| [[nep-24.mediawiki|24]]
 | NFT Royalty Standard
 | Owen Zhang, Vincent Geneste
 | Standard