update doc string

ibc-core/ics02-client/context/src/consensus_state.rs

@@ -24,7 +24,7 @@ pub trait ConsensusState: Send + Sync + ConsensusStateDecoder {
     /// The timestamp of the consensus state
     fn timestamp(&self) -> Timestamp;
 
-    /// Serializes the `ConsensusState`.
+    /// Protobuf encoded bytes of the [`Any`] formatted [`ConsensusState`].
     fn encode_vec(self) -> Vec<u8> {
         self.into().to_vec()
     }