Fix copy/paste mistakes in migration dependencies

aleksis/core/migrations/0008_rename_fields_notification_activity.py

@@ -7,7 +7,7 @@ from django.db import migrations, models
 class Migration(migrations.Migration):
 
     dependencies = [
-        ('core', '0005_add_verbose_names_meta.py'),
+        ('core', '0005_add_verbose_names_meta'),
     ]
 
     operations = [

aleksis/core/migrations/0011_make_primary_group_optional.py

@@ -7,7 +7,7 @@ import django.db.models.deletion
 class Migration(migrations.Migration):
 
     dependencies = [
-        ('core', '0009_dashboard_widget.py'),
+        ('core', '0009_dashboard_widget'),
     ]
 
     operations = [