fix: 还原graph demo中的OnDragNodeConfig

Author: DymoneLewis

examples/feature-examples/src/pages/graph/index.tsx

@@ -33,7 +33,7 @@ import centerAnchorRect from './nodes/centerAnchorRect'
 import GraphData = LogicFlow.GraphData
 import styles from './index.less'
 
-// import OnDragNodeConfig = LogicFlow.OnDragNodeConfig
+import OnDragNodeConfig = LogicFlow.OnDragNodeConfig
 
 const NodeComponent: FC<ReactNodeProps> = ({ node }) => {
   const data = node.getData()