Update reference in RSKIP529 (#538)

Author: marcos-iov

IPs/RSKIP529.md

@@ -28,7 +28,7 @@ This RSKIP adds new storage cells to the Bridge native contract for storing base
 
 RSKIP535 [2](#references) defines how base event information can be stored in the block header extension to enable efficient zero-knowledge proofs of cumulative work. However, for this mechanism to work effectively, the Union Bridge contract needs a way to store and manage the current base and super event data that will be included in block headers.
 
-The Bridge native contract provides persistent storage capabilities to maintain the current state of base and super events. As described in RSKIP353, this data is then used by miners to populate the baseEvent field in block headers, enabling the zero-knowledge proof functionality.
+The Bridge native contract provides persistent storage capabilities to maintain the current state of base and super events. As described in RSKIP535 [2](#references), this data is then used by miners to populate the baseEvent field in block headers, enabling the zero-knowledge proof functionality.
 
 ## Specification