Fix a typo in 1.11.3 (Promises chaining)

Author: vsemozhetbyt

1-js/11-async/03-promise-chaining/article.md

@@ -265,7 +265,7 @@ fetch('/article/promise-chaining/user.json')
 
 Now let's do something with the loaded user.
 
-For instance, we can make one more requests to GitHub, load the user profile and show the avatar:
+For instance, we can make one more request to GitHub, load the user profile and show the avatar:
 
 ```js run
 // Make a request for user.json