Feat: Set the return value of the webhook to a string. #10427 (#11945)

### What problem does this PR solve?

Feat: Set the return value of the webhook to a string. #10427

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

web/src/pages/agent/form/begin-form/index.tsx

@@ -83,7 +83,7 @@ function BeginForm({ node }: INextOperatorForm) {
   });
 
   return (
-    <section className="px-5 space-y-5">
+    <section className="px-5 space-y-5 pb-4">
       <Form {...form}>
         <FormField
           control={form.control}