refactor(minimap): use minimap package in examples

examples/nextjs/pages/UseReactFlow/index.tsx

@@ -4,7 +4,6 @@ import ReactFlow, {
   Node,
   addEdge,
   Background,
-  MiniMap,
   useReactFlow,
   ReactFlowProvider,
   Connection,
@@ -13,6 +12,8 @@ import ReactFlow, {
   useEdgesState,
 } from '@react-flow/core';
 
+import MiniMap from '@react-flow/minimap';
+
 const initialNodes: Node[] = [
   {
     id: '1',