migration: allow nullable alternative_email field

jdav_web/members/migrations/0017_alter_member_alternative_email.py

@@ -0,0 +1,18 @@
+# Generated by Django 4.0.1 on 2024-10-15 21:22
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('members', '0016_alter_emergencycontact_confirmed_mail_and_more'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='member',
+            name='alternative_email',
+            field=models.EmailField(blank=True, default=None, max_length=100, null=True),
+        ),
+    ]