fix gh action error

Author: rnbguy

crates/ibc/src/mock/context.rs

@@ -323,7 +323,7 @@ impl From<MockContextConfig> for MockContext {
         MockContext {
             host_chain_type: params.host_type,
             host_chain_id: params.host_id.clone(),
-            max_history_size: params.max_history_size,
+            max_history_size: params.max_history_size as u64,
             history: (0..n)
                 .rev()
                 .map(|i| {