Update application.yml.example

[davidwisniowski]

i still need the ?createDatabaseIfNotExist=true parameter. without this parameter it says at starting spring boot: unknown database even with hibernate ddl-auto create-drop

[victorwrotethis]

Good point. If you could be so kind to change the create-drop to update instead in the same PR that would be great. While beneficial for testing it is something I disable on production or otherwise on a restart you lose your data.

[davidwisniowski]

done :)