Make pure-SQL line in api_user.display_name migration elidable

Co-authored-by: jchristgit <jc@jchri.st>

pydis_site/apps/api/migrations/0095_user_display_name.py

@@ -14,5 +14,5 @@ class Migration(migrations.Migration):
             name="display_name",
             field=models.CharField(blank=True, help_text="The display name, taken from Discord.", max_length=32),
         ),
-        migrations.RunSQL("UPDATE api_user SET display_name = name;"),
+        migrations.RunSQL("UPDATE api_user SET display_name = name;", elidable=True),
     ]