Fix typo (practical-tutorials#333)

Thanks!

README.md

@@ -225,7 +225,7 @@ To get started, simply fork this repo. Please refer to [CONTRIBUTING.md](CONTRIB
 - [Make a Chat Application](https://medium.freecodecamp.org/how-to-build-a-chat-application-using-react-redux-redux-saga-and-web-sockets-47423e4bc21a)
 - [Create a News App with React Native](https://medium.freecodecamp.org/create-a-news-app-using-react-native-ced249263627)
 - [Learn Webpack For React](https://medium.freecodecamp.org/learn-webpack-for-react-a36d4cac5060)
-- [Testing React App With Pupepeteer and Jest](https://blog.bitsrc.io/testing-your-react-app-with-puppeteer-and-jest-c72b3dfcde59)
+- [Testing React App With Puppeteer and Jest](https://blog.bitsrc.io/testing-your-react-app-with-puppeteer-and-jest-c72b3dfcde59)
 - [Build Your Own React Boilerplate](https://medium.freecodecamp.org/how-to-build-your-own-react-boilerplate-2f8cbbeb9b3f)
 - [Code The Game Of Life With React](https://medium.freecodecamp.org/create-gameoflife-with-react-in-one-hour-8e686a410174)
 - [A Basic React+Redux Introductory Tutorial](https://hackernoon.com/a-basic-react-redux-introductory-tutorial-adcc681eeb5e)