Fix equality typo in development.rb of test_app

[reczy]

I came across this typo when trying to run bin/setup on the latest version of good_job.

For the sake of completeness, the error I received was:

rails aborted!
ActiveRecord::NoDatabaseError: FATAL:  database "test_app_development" does not exist


Caused by:
PG::ConnectionBad: FATAL:  database "test_app_development" does not exist

Tasks: TOP => db:setup => db:create => db:load_config
(See full trace by running task with --trace)

== Command ["bundle exec bin/rails db:setup"] failed ==

bin/setup worked fine for me after making the change.

[bensheldon]

Thanks for catching and fixing that!