fix animationData import in the example

[samzmann]

The recommended way to import animationData does not work and has caused a few issues. See:

• https://github.com/chenqingspring/react-lottie/issues/115
• https://github.com/chenqingspring/vue-lottie/issues/20 (in a different repo, but same issue)

This error in the docs is quite misleading. This quick edit should remove the confusion.