chore(readme): fix typo

README.md

@@ -423,7 +423,7 @@ node-fetch comes with a spec-compliant [FormData] implementations for posting
 multipart/form-data payloads
 
 ```js
-import fetch {FormData, File, fileFrom} from 'node-fetch'
+import fetch, { FormData, File, fileFrom } from 'node-fetch'
 
 const httpbin = 'https://httpbin.org/post'
 const formData = new FormData()
@@ -868,4 +868,4 @@ Thanks to [github/fetch](https://github.com/github/fetch) for providing a solid
 [error-handling.md]: https://github.com/node-fetch/node-fetch/blob/master/docs/ERROR-HANDLING.md
 [FormData]: https://developer.mozilla.org/en-US/docs/Web/API/FormData
 [Blob]: https://developer.mozilla.org/en-US/docs/Web/API/Blob
-[File]: https://developer.mozilla.org/en-US/docs/Web/API/File
+[File]: https://developer.mozilla.org/en-US/docs/Web/API/File