message: docs(readme): add edges example
diff: @@ -281,6 +281,7 @@ You can find all examples in the [example](example) folder or check out the live
  - [basic](https://react-flow.netlify.app/basic)
  - [custom node](https://react-flow.netlify.app/custom-node)
  - [stress](https://react-flow.netlify.app/stress)
  +- [edges](https://react-flow.netlify.app/edges)
  - [empty](https://react-flow.netlify.app/empty)
  - [inactive](https://react-flow.netlify.app/inactive)
  