fix: elusive unwanted "else null" in Procedure ND-DirectAward

This throws off the transformation of tran (T01) notices such as
Planning_EFT01_00665129-2023.xml, which exercise the DirectAwardTerm
connection from Procedure.

Relates to fix for TEDSWS-432.

Author: schivmeister

src/mappings-can/Procedure-can.rml.ttl

@@ -35,7 +35,7 @@ tedm:MG-Procedure_ND-DirectAward a rr:TriplesMap ;
     rr:subjectMap
         [
             rdfs:label "ND-DirectAward";
-            rml:reference "'http://data.europa.eu/a4g/resource/' || /*/cbc:ID[@schemeName='notice-id'] || '-' || /*/cbc:VersionID || '/Procedure/' || (if (exists(/*/cbc:ContractFolderID)) then encode-for-uri(/*/cbc:ContractFolderID) else '0000000-0000-4000-8000-000000000000') else null" ;
+            rml:reference "'http://data.europa.eu/a4g/resource/' || /*/cbc:ID[@schemeName='notice-id'] || '-' || /*/cbc:VersionID || '/Procedure/' || (if (exists(/*/cbc:ContractFolderID)) then encode-for-uri(/*/cbc:ContractFolderID) else '0000000-0000-4000-8000-000000000000')" ;
             rr:class epo:Procedure
         ] ;