Update README.md (gatsbyjs#25901)

No need to link to `example.com` it's a sample domain.

README.md

@@ -238,7 +238,7 @@ The file node can then be queried using GraphQL. See an example of this in the [
 
 #### Retrieving the remote file name and extension
 
-The helper tries first to retrieve the file name and extension by parsing the url and the path provided (e.g. if the url is https://example.com/image.jpg, the extension will be inferred as `.jpg` and the name as `image`). If the url does not contain an extension, we use the [`file-type`](https://www.npmjs.com/package/file-type) package to infer the file type. Finally, the name and the extension _can_ be explicitly passed, like so:
+The helper tries first to retrieve the file name and extension by parsing the url and the path provided (e.g. if the url is `https://example.com/image.jpg`, the extension will be inferred as `.jpg` and the name as `image`). If the url does not contain an extension, we use the [`file-type`](https://www.npmjs.com/package/file-type) package to infer the file type. Finally, the name and the extension _can_ be explicitly passed, like so:
 
 ```javascript
 createRemoteFileNode({