update google_project inline documentation

[chris-rock]

Our example in https://github.com/inspec/inspec-gcp/blob/master/libraries/google_project.rb#L11-L16does is not correct anymore and should be updated to reflect the required arguments as used https://github.com/inspec/inspec-gcp/blob/master/test/integration/verify/controls/gcp_project.rb#L12-L17

describe google_project(project: 'gcp_project_id') do
    it { should exist }
    its('name') { should eq gcp_project_name }
    its('project_number') { should cmp gcp_project_number }
    its('lifecycle_state') { should eq "ACTIVE" }
end