Fix a config example for uber path

Author: anastely

README.md

@@ -34,7 +34,7 @@ These providers are OpenID compliant, which means you can use [autodiscovery](ht
 
 These providers implement the OAuth2 spec, but are not OpenID providers, which means you must configure the authorization and token endpoints yourself.
 
-- [Uber](https://developer.uber.com/docs/deliveries/guides/three-legged-oauth.md) ([Example configuration](./docs/config-examples/uber))
+- [Uber](https://developer.uber.com/docs/deliveries/guides/three-legged-oauth.md) ([Example configuration](./docs/config-examples/uber.md))
 - [Fitbit](https://dev.fitbit.com/build/reference/web-api/oauth2/) ([Example configuration](./docs/config-examples/fitbit.md))
 - [Dropbox](https://www.dropbox.com/developers/reference/oauth-guide) ([Example configuration](./docs/config-examples/dropbox.md))
 - [Reddit](https://github.com/reddit-archive/reddit/wiki/oauth2) ([Example configuration](./docs/config-examples/reddit.md))