Feat: Adjust the style of note nodes #9869 (#10547)

### What problem does this PR solve?

Feat: Adjust the style of note nodes #9869

### Type of change


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

web/src/pages/agent/canvas/node/node-header.tsx

@@ -18,7 +18,7 @@ const InnerNodeHeader = ({
   wrapperClassName,
 }: IProps) => {
   return (
-    <section className={cn(wrapperClassName, 'pb-4')}>
+    <section className={cn(wrapperClassName, 'pb-2')}>
       <div className={cn(className, 'flex gap-2.5')}>
         <OperatorIcon name={label as Operator}></OperatorIcon>
         <span className="truncate text-center font-semibold text-sm">