Add migration for visibility rename.

hypha/apply/activity/migrations/0057_rename_team_staff.py

+# Generated by Django 2.2.24 on 2021-08-16 14:48
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('activity', '0056_add_updated_vendor'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='activity',
+            name='visibility',
+            field=models.CharField(choices=[('applicant', 'Applicant(s)'), ('team', 'Staff'), ('reviewers', 'Reviewers'), ('partners', 'Partners'), ('all', 'All')], default='applicant', max_length=30),
+        ),
+    ]