feat: fixed a mock import order

2 mocks were brought in an opposite order, but until this change, they
always had the same result  so nobody had noticed.

FIXES: APER-3535

openedx/core/djangoapps/programs/tests/test_signals.py

@@ -238,8 +238,8 @@ def test_programs_enabled(self, mock_is_learner_issuance_enabled, mock_task):
 
 
 @skip_unless_lms
-@mock.patch('openedx.core.djangoapps.programs.tasks.update_certificate_visible_date_on_course_update.delay')
 @mock.patch('openedx.core.djangoapps.programs.tasks.update_certificate_available_date_on_course_update.delay')
+@mock.patch('openedx.core.djangoapps.programs.tasks.update_certificate_visible_date_on_course_update.delay')
 @mock.patch(
     'openedx.core.djangoapps.credentials.models.CredentialsApiConfig.is_learner_issuance_enabled',
     new_callable=mock.PropertyMock,