Update 10_react_project_folder_structure.md

Fix typo in the import statement

10_React_Project_Folder_Structure/10_react_project_folder_structure.md

@@ -86,7 +86,7 @@ Exporting in a function declaration, a regular function
 
 ```js
 // src/App.js
-import React from 'react
+import React from 'react'
 // named export in regular function, function declaration
 export function App () {
 return <h1>Welcome to 30 Days Of React</h1>