fix: Add available_name as method in captain_assistant (#11502)

Fixes
https://linear.app/chatwoot/issue/CW-4366/actionviewtemplateerror-undefined-method-available-name-for-an

app/javascript/dashboard/components-next/captain/pageComponents/assistant/EditAssistantForm.vue

@@ -100,7 +100,10 @@ const handleBasicInfoUpdate = async () => {
   const payload = {
     name: state.name,
     description: state.description,
-    product_name: state.productName,
+    config: {
+      ...props.assistant.config,
+      product_name: state.productName,
+    },
   };
 
   emit('submit', payload);