Prefer Time.zone.now to pair with Time.zone.name

`Time.now` is local time, yet `Time.zone.now` is application
configuration time. They can be different.

spec/models/ci/pipeline_schedule_spec.rb

@@ -97,7 +97,7 @@ describe Ci::PipelineSchedule do
 
     let(:cron_worker_next_run_at) do
       Gitlab::Ci::CronParser.new(Settings.cron_jobs['pipeline_schedule_worker']['cron'], Time.zone.name)
-        .next_time_from(Time.now)
+        .next_time_from(Time.zone.now)
     end
 
     context 'when creates new pipeline schedule' do