fixup! docs: ica channel closing flows

packages/boot/tools/ibc/README.md

@@ -83,28 +83,29 @@ sequenceDiagram
 
     CC->>R: ChanCloseInit(PortID, ChannelID)
     R->>HC: ChanCloseConfirm(PortID, ChannelID)
-    HC->>HC: CloseChannel(PortID, ChannelID)
-    HC-->>R: OnChanCloseConfirm
-    R->>CC: ChanCloseAck
+    HC->>HC: OnChanCloseConfirm(portID, channelID)
+    HC-->>R: Success
+    R->>CC: ChanCloseConfirm
     CC->>CC: CloseChannel(PortID, ChannelID)
 ```
 Mock Testing: 
- - on `ChanCloseInit`, return `ChanCloseAck`
+ - on `ChanCloseInit`, return `ChanCloseConfirm`
 
-### ICA Channel Closing (from Host)
+### ICA Channel Closing (from Host - Unexpected closure)
 
 ```mermaid
 sequenceDiagram
     participant CC as Controller Chain
     participant R as Relayer
     participant HC as Host Chain
-
-    HC->>R: ChanCloseInit(PortID, ChannelID)
+    
+    HC-->>R: Channel closed unexpectedly
     R->>CC: ChanCloseConfirm(PortID, ChannelID)
-    CC->>CC: CloseChannel(PortID, ChannelID)
-    CC-->>R: OnChanCloseConfirm
-    R->>HC: ChanCloseAck
-    HC->>HC: CloseChannel(PortID, ChannelID)
+    CC->>CC: OnChanCloseConfirm
+    CC-->>R: Acknowledge closure
+
+    Note over CC: Handle unexpected closure
+    Note over HC: Unexpected channel closure (e.g., timeout in ORDERED channel)
 ```
 Mock Testing: 
  - `ChanCloseConfirm` event is emitted