Issue 1843 - Fix default bundles example in config.example.yml

Provides the correct YAML configuration for configuring
the default bundles configuration.

Author: dsteelma-umd

config/config.example.yml

@@ -264,7 +264,7 @@ themes:
 
 # The default bundles that should always be displayed as suggestions when you upload a new bundle
 bundle:
-  - standardBundles: [ ORIGINAL, THUMBNAIL, LICENSE ]
+  standardBundles: [ ORIGINAL, THUMBNAIL, LICENSE ]
 
 # Whether to enable media viewer for image and/or video Bitstreams (i.e. Bitstreams whose MIME type starts with 'image' or 'video').
 # For images, this enables a gallery viewer where you can zoom or page through images.