Tweak the changelog
Tweak the changelog

This commits fixes the following build error.

```console
% bundle exec rspec spec/project_spec.rb
(snip)

Failures:

  1) RuboCop Project Changelog has newline at end of file
     Failure/Error: expect(changelog.end_with?("\n")).to be true

       expected true
            got false
     Shared Example Group: "has Changelog format" called from
            ./spec/project_spec.rb:224
     # ./spec/project_spec.rb:124:in `block (3 levels) in
            <top (required)>'

Finished in 2.86 seconds (files took 2.21 seconds to load)
24 examples, 1 failure

Failed examples:

rspec ./spec/project_spec.rb:123 # RuboCop Project Changelog has newline
at end of file

Randomized with seed 13316
```

rrosenblum/rubocop,tejasbubane/rubocop,maxjacobson/rubocop,tejasbubane/rubocop,rrosenblum/rubocop,tdeo/rubocop,maxjacobson/rubocop,tejasbubane/rubocop,maxjacobson/rubocop,tdeo/rubocop,rrosenblum/rubocop,bbatsov/rubocop,bbatsov/rubocop,tdeo/rubocop