Fix typo in blogpost

I fixed this in the changelog, but missed this one.

_posts/2013-07-17-react-v0-4-0.md

@@ -30,7 +30,7 @@ When you're ready, [go download it](/react/downloads.html)!
 
 * Support for comment nodes `<div>{/* this is a comment and won't be rendered */}</div>`
 * Children are now transformed directly into arguments instead of being wrapped in an array
-  E.g. `<div><Component1/><Component2></div>` is transformed into `React.DOM.div(null, Component1(null), Component2(null))`.
+  E.g. `<div><Component1/><Component2/></div>` is transformed into `React.DOM.div(null, Component1(null), Component2(null))`.
   Previously this would be transformed into `React.DOM.div(null, [Component1(null), Component2(null)])`.
   If you were using React without JSX previously, your code should still work.