Update configuration.md 📝

Author: abhijeetps

docs/configuration.md

@@ -1,7 +1,7 @@
 ## Configuring your applications
 
 The app provides features to customize your application. To configure your application, 
-1. Create a file _.github/config.yml_ in your repository, where the app has been installed.
+1. Create a file _.github/weekly-digest.yml_ in your repository, where the app has been installed.
 2. Add the following configuration in the file:
    ```yaml
    # Configuration for weekly-digest - https://github.com/apps/weekly-digest