fix: Update timezone to get wday from working_hours (#5605)

Co-authored-by: Pranav Raj S <pranav@chatwoot.com>

spec/models/working_hour_spec.rb

@@ -88,4 +88,18 @@ RSpec.describe WorkingHour do
                          'Validation failed: open_all_day and closed_all_day cannot be true at the same time')
     end
   end
+
+  context 'when on monday 9am in Sydney timezone' do
+    let(:inbox) { create(:inbox) }
+
+    before do
+      Time.zone = 'Australia/Sydney'
+      inbox.update(timezone: 'Australia/Sydney')
+      travel_to '10.10.2022 9:00 AEDT'
+    end
+
+    it 'is considered working hour' do
+      expect(described_class.today.open_now?).to be true
+    end
+  end
 end