fix(docs): typo within connect in upload.md (#322)
fix(docs): typo within connect in upload.md (#322)

Ignore if not relevant for the decorator syntax, but in my redux store the uploadedFiles is under firebase.data

```
export default compose(
  firebaseConnect([filesPath]),
  connect(({ firebase: { data } }) => ({
    uploadedFiles: data[filesPath]
  }))
)(Uploader);
```
prescottprue/react-redux-firebase,prescottprue/react-redux-firebase