useContext bug.

Fix bug useContext and react-router-dom

When we use  react-browser-router and  useContext in a project, there is a chance for getting error.So we need to add a Fragment tag as follows.

   app.js
************
  function app =()=>{
  return(
     <GlobalContext.Provider>
     <Fragment>
     <Routes>
     <Route path='/' element={<home.js/>}/>
     <Route path='/about' element={<about.js/>}/>
     </Routes>
     </Fragment>
     </GLobalContext.Provider>
  )
  }
  
  Context.js
  **********
  import {createContext} from 'react'
  export const GlobalContext=createContext()