Added missing migration file

InvenTree/users/migrations/0004_auto_20210113_1909.py

@@ -0,0 +1,18 @@
+# Generated by Django 3.0.7 on 2021-01-13 19:09
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('users', '0003_auto_20201005_2227'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='ruleset',
+            name='name',
+            field=models.CharField(choices=[('admin', 'Admin'), ('part_category', 'Part Categories'), ('part', 'Parts'), ('stock_location', 'Stock Locations'), ('stock', 'Stock Items'), ('build', 'Build Orders'), ('purchase_order', 'Purchase Orders'), ('sales_order', 'Sales Orders')], help_text='Permission set', max_length=50),
+        ),
+    ]