Revise language for inclusivity and fix link

The link of an example React MVC of this task is updated.
Changed "he" to "they" because "user" isn't specific

Projects/2-Intermediate/To-Do-App.md

@@ -2,7 +2,7 @@
 
 **Tier:** 2-Intermediate
 
-The classic To-Do application where a user can write down all the things he wants to accomplish.
+The classic To-Do application where a user can write down all the things they wants to accomplish.
 
 ## User Stories
 
@@ -25,7 +25,7 @@ The classic To-Do application where a user can write down all the things he want
 
 ## Example projects
 
--   [Todo App built with React](http://todomvc.com/examples/react/#/)
+-   [Todo App built with React](https://todomvc.com/examples/react/dist/)
 -   [To Do List on Codepen](https://codepen.io/yesilfasulye/pen/eJIuF) by [Burak Kaya](https://codepen.io/yesilfasulye/)
 -   [Todo App in Plain JavaScript](https://safdarjamal.github.io/todo-app/)
 -   [Todo App in Golang](https://github.com/schadokar/go-to-do-app)