CLDC-4028: Fix created at name change in lettings log

always safer to use updated at for checking whether the record has changed

app/services/exports/lettings_log_export_service.rb

@@ -58,10 +58,10 @@ module Exports
 
       # these must be separate as activerecord struggles to join to two different name change tables in the same query
       ids.concat(
-        relation.left_joins(owning_organisation: :organisation_name_changes).where(owning_organisation: { organisation_name_changes: { created_at: range } }).pluck(:id),
+        relation.left_joins(owning_organisation: :organisation_name_changes).where(owning_organisation: { organisation_name_changes: { updated_at: range } }).pluck(:id),
       )
       ids.concat(
-        relation.left_joins(managing_organisation: :organisation_name_changes).where(managing_organisation: { organisation_name_changes: { created_at: range } }).pluck(:id),
+        relation.left_joins(managing_organisation: :organisation_name_changes).where(managing_organisation: { organisation_name_changes: { updated_at: range } }).pluck(:id),
       )
 
       LettingsLog.where(id: ids)