Add missing Twitter link (#966)

content/blog/2018-06-07-you-probably-dont-need-derived-state.md

@@ -344,4 +344,4 @@ When using memoization, remember a couple of constraints:
 
 In real world applications, components often contain a mix of controlled and uncontrolled behaviors. This is okay! If each value has a clear source of truth, you can avoid the anti-patterns mentioned above.
 
-It is also worth re-iterating that `getDerivedStateFromProps` (and derived state in general) is an advanced feature and should be used sparingly because of this complexity. If your use case falls outside of these patterns, please share it with us on [GitHub](https://github.com/reactjs/reactjs.org/issues/new) or Twitter!
+It is also worth re-iterating that `getDerivedStateFromProps` (and derived state in general) is an advanced feature and should be used sparingly because of this complexity. If your use case falls outside of these patterns, please share it with us on [GitHub](https://github.com/reactjs/reactjs.org/issues/new) or [Twitter](https://twitter.com/reactjs)!