Update 2018-10-23-react-v-16-6.md (#1428)

content/blog/2018-10-23-react-v-16-6.md

@@ -46,7 +46,7 @@ In [React 16.3](/blog/2018/03/29/react-v-16-3.html) we introduced the official C
 const MyContext = React.createContext();
 ```
 
-We've heard feedback that adopting the new render prop API can be difficult in class components. So we've add a convenience API to [consume a context value from within a class component](/docs/context.html#classcontexttype).
+We've heard feedback that adopting the new render prop API can be difficult in class components. So we've added a convenience API to [consume a context value from within a class component](/docs/context.html#classcontexttype).
 
 ```js
 class MyClass extends React.Component {