fix typo (#1520)

fix typo

Author: lex111

5-network/01-fetch/article.md

@@ -89,7 +89,7 @@ fetch('https://api.github.com/repos/javascript-tutorial/en.javascript.info/commi
   .then(commits => alert(commits[0].author.login));
 ```
 
-To get the reponse text, `await response.text()` instead of `.json()`:
+To get the response text, `await response.text()` instead of `.json()`:
 
 ```js run async
 let response = await fetch('https://api.github.com/repos/javascript-tutorial/en.javascript.info/commits');