test: Use timezone aware datetime (#7918)

* test: Use timezone aware datetime

* fixup! test: Use timezone aware datetime

ietf/meeting/tests_models.py

@@ -158,7 +158,7 @@ def test_alpha_str(self):
 
     def test_session_recording_url(self):
         group_acronym = "foobar"
-        meeting_date = datetime.date.today()
+        meeting_date = date_today()
         meeting_number = 123
 
         # IETF meeting