Update CONTRIBUTING.md (reactjs#1234)

rishi1999 · alexkrolick · commit 41ac3cf45d08 · 2018-10-07T15:08:40.000-07:00
The code example directly before the statement "Use semicolons" was missing a semicolon :)
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
@@ -72,7 +72,7 @@ Instead, **do** write this:
 ```js
 class MyComponent extends React.Component {
   constructor(props) {
-    super(props)
+    super(props);
     this.handleChange = this.handleChange.bind(this);
     this.state = {value: ''};
   }

Original file line number	Diff line number	Diff line change
`@@ -72,7 +72,7 @@ Instead, do write this:`
`72`	`72`	```js
`73`	`73`	`class MyComponent extends React.Component {`
`74`	`74`	`constructor(props) {`
`75`		`- super(props)`
	`75`	`+ super(props);`
`76`	`76`	`this.handleChange = this.handleChange.bind(this);`
`77`	`77`	`this.state = {value: ''};`
`78`	`78`	`}`