add missing migration

src/purchase/migrations/0019_alter_productcategory_options.py

@@ -0,0 +1,19 @@
+# Generated by Django 4.2.8 on 2024-01-20 08:15
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("purchase", "0018_product_category"),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name="productcategory",
+            options={
+                "verbose_name": "product category",
+                "verbose_name_plural": "product categories",
+            },
+        ),
+    ]