refactor(minimap): use minimap package in examples

examples/nextjs/pages/Hidden/index.tsx

@@ -2,7 +2,6 @@ import React, { useState, useEffect, useCallback } from 'react';
 
 import ReactFlow, {
   addEdge,
-  MiniMap,
   Controls,
   Connection,
   Edge,
@@ -11,6 +10,8 @@ import ReactFlow, {
   useEdgesState,
 } from '@react-flow/core';
 
+import MiniMap from '@react-flow/minimap';
+
 const initialNodes: Node[] = [
   {
     id: '1',