chore: Update region name_en field to allow null and blank values

backend/server/worldtravel/migrations/0003_alter_region_name_en.py

@@ -0,0 +1,18 @@
+# Generated by Django 5.0.8 on 2024-08-21 14:33
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('worldtravel', '0002_region_name_en'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='region',
+            name='name_en',
+            field=models.CharField(blank=True, max_length=100, null=True),
+        ),
+    ]