Fix typo in README.md (mbeaudru#114)

suexcxine · mbeaudru · commit df9572d776f7 · 2018-05-16T14:25:53.000+02:00
diff --git a/README.md b/README.md
@@ -1723,7 +1723,7 @@ class Repo{
 console.log(Repo.getName()) // Repo name is modern-js-cheatsheet
 
 let r = new Repo();
-console.log(r.getName()) // Uncaught TypeError: repo.getName is not a function
+console.log(r.getName()) // Uncaught TypeError: r.getName is not a function
 ```
 
 #### Detailed explanation
