use unique, descriptive package name

[discospiff]

com.example is the default. Choose something that uniquely identifies your application.

https://github.com/Yep-Was-Taken/pupBuddy/blob/5099d16225a345c70ce24dd94cee6ff6011b9a45/src/main/java/com/example/pupbuddy/PupBuddyApplication.java#L1