Correct No.140 question

regchiu · web-flow · commit 1c1f34cfd137 · 2020-03-02T09:40:46.000+08:00
As title.
diff --git a/README.md b/README.md
@@ -4534,7 +4534,7 @@ In ES2020, we can add private variables in classes by using the `#`. We cannot a
 
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-###### 140. What's the output?
+###### 140. What's missing?
 
 ```javascript
 const teams = [
