migrations: Add migration for RealmAuditLog ordering.

Because this might impact how past RealmAuditLog-reading migrations
are processed, I think it's better to this one as an actual Django
migration, even though it has no actual SQL to run.

zerver/migrations/0541_alter_realmauditlog_options.py

@@ -0,0 +1,16 @@
+# Generated by Django 5.0.6 on 2024-06-27 00:12
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("zerver", "0540_remove_realm_create_private_stream_policy"),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name="realmauditlog",
+            options={"ordering": ["id"]},
+        ),
+    ]