feat: modify the style of the operator #918 (#1335)

### What problem does this PR solve?

feat: modify the style of the operator #918
### Type of change


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

web/src/pages/flow/canvas/node/dropdown.tsx

@@ -38,6 +38,7 @@ const NodeDropdown = ({ id }: IProps) => {
   return (
     <OperateDropdown
       iconFontSize={14}
+      height={14}
       deleteItem={deleteNode}
       items={items}
     ></OperateDropdown>