chore: migrate fields whose defaults changed to date_today

ietf/review/migrations/0030_use_date_today_helper.py

@@ -0,0 +1,24 @@
+# Generated by Django 2.2.28 on 2022-10-18 15:43
+
+from django.db import migrations, models
+import ietf.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('review', '0029_use_timezone_now_for_review_models'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='historicalunavailableperiod',
+            name='start_date',
+            field=models.DateField(default=ietf.utils.timezone.date_today, help_text="Choose the start date so that you can still do a review if it's assigned just before the start date - this usually means you should mark yourself unavailable for assignment some time before you are actually away. The default is today.", null=True),
+        ),
+        migrations.AlterField(
+            model_name='unavailableperiod',
+            name='start_date',
+            field=models.DateField(default=ietf.utils.timezone.date_today, help_text="Choose the start date so that you can still do a review if it's assigned just before the start date - this usually means you should mark yourself unavailable for assignment some time before you are actually away. The default is today.", null=True),
+        ),
+    ]

ietf/submit/migrations/0012_use_date_today_helper.py

@@ -0,0 +1,19 @@
+# Generated by Django 2.2.28 on 2022-10-18 15:43
+
+from django.db import migrations, models
+import ietf.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('submit', '0011_use_timezone_now_for_submit_models'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='submission',
+            name='submission_date',
+            field=models.DateField(default=ietf.utils.timezone.date_today),
+        ),
+    ]