slapos_accounting: Include parent_specialise_uid on catalog related key

This is required for nexedi/slapos.core@3f0dd2e5

master/bt5/slapos_accounting/CatalogRelatedKeyTemplateItem/related_key_list.xml

 <key_list>
  <key>causality_payment_transaction_related_uid | category,catalog/uid/z_related_causality_payment_transaction</key>
  <key>children_portal_type | catalog/portal_type/z_related_children</key>
+ <key>parent_specialise_uid | category,catalog/uid/z_related_parent_specialise</key>
 </key_list>
\ No newline at end of file

master/bt5/slapos_accounting/bt/template_catalog_related_key_list

 children_portal_type | catalog/portal_type/z_related_children
-causality_payment_transaction_related_uid | category,catalog/uid/z_related_causality_payment_transaction
\ No newline at end of file
+causality_payment_transaction_related_uid | category,catalog/uid/z_related_causality_payment_transaction
+parent_specialise_uid | category,catalog/uid/z_related_parent_specialise
\ No newline at end of file