fix deprecated use QSet<T>::toList()

src/output/proticdbml.cpp

@@ -832,7 +832,7 @@ ProticdbMl::writeMatch(std::vector<const ProteinMatch *> &protein_match_sg_list)
           sample_name_list
             << peptide_match.getPeptideEvidence()->getMsRunP()->getSampleName();
         }
-      sample_name_list = sample_name_list.toSet().toList();
+      sample_name_list = sample_name_list.toSet().values();
       for(QString sample_name : sample_name_list)
         {
           _output_stream->writeStartElement("matchSample");