Update reflect schema

Author: ethanfrey

contracts/reflect/schema/response_for__custom_msg.json

@@ -26,7 +26,7 @@
       ]
     },
     "messages": {
-      "description": "Optional list of messages to pass. These will be executed in order. If the ReplyOn member is set, they will invoke this contract's `reply` entry point after execution. Otherwise, they act like \"fire and forget\". Use `call` or `msg.into()` to create messages with the older \"fire and forget\" semantics.",
+      "description": "Optional list of messages to pass. These will be executed in order. If the ReplyOn variant matches the result (Always, Success on Ok, Error on Err), the runtime will invoke this contract's `reply` entry point after execution. Otherwise, they act like \"fire and forget\". Use `call` or `msg.into()` to create messages with the older \"fire and forget\" semantics.",
       "type": "array",
       "items": {
         "$ref": "#/definitions/SubMsg_for_CustomMsg"