fix migrations file

hypha/apply/funds/migrations/0073_reminder.py

-# Generated by Django 2.2.11 on 2020-03-19 10:24
+# Generated by Django 2.2.11 on 2020-03-19 12:31
 
 from django.conf import settings
 from django.db import migrations, models
@@ -18,7 +18,7 @@ class Migration(migrations.Migration):
             fields=[
                 ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                 ('time', models.DateTimeField()),
-                ('action', models.CharField(choices=[('reviewers_review', 'Remind reviewers to Review')], max_length=50)),
+                ('action', models.CharField(choices=[('reviewers_review', 'Remind reviewers to Review')], default='reviewers_review', max_length=50)),
                 ('medium', models.CharField(choices=[('email', 'Email')], default='email', max_length=15)),
                 ('sent', models.BooleanField(default=False)),
                 ('submission', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='reminders', to='funds.ApplicationSubmission')),

hypha/apply/funds/models/reminders.py

@@ -29,6 +29,7 @@ class Reminder(models.Model):
     time = models.DateTimeField()
     action = models.CharField(
         choices=ACTIONS.items(),
+        default=REVIEW,
         max_length=50,
     )
     medium = models.CharField(