Update reference-react-dom-server.md (#625)

Fixes a small typo in `renderToNodeStream`'s documentation

content/docs/reference-react-dom-server.md

@@ -69,7 +69,7 @@ If you call [`ReactDOM.hydrate()`](/docs/react-dom.html#hydrate) on a node that
 >
 > Server-only. This API is not available in the browser.
 >
-> The stream returned from this method will return a byte stream encoded in utf-8. If you need a stream in another encoding, take a look a project like [iconv-lite](https://www.npmjs.com/package/iconv-lite), which provides transform streams for transcoding text.
+> The stream returned from this method will return a byte stream encoded in utf-8. If you need a stream in another encoding, take a look at a project like [iconv-lite](https://www.npmjs.com/package/iconv-lite), which provides transform streams for transcoding text.
 
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