Use std::bind in QtConcurrent::run() to fix compile with Qt 6

src/organise/organisedialog.cpp

@@ -22,6 +22,7 @@
 #include "config.h"
 
 #include <memory>
+#include <functional>
 #include <algorithm>
 
 #include <QtGlobal>
@@ -344,7 +345,7 @@ bool OrganiseDialog::SetUrls(const QList<QUrl> &urls) {
 
 bool OrganiseDialog::SetFilenames(const QStringList &filenames) {
 
-  songs_future_ = QtConcurrent::run(this, &OrganiseDialog::LoadSongsBlocking, filenames);
+  songs_future_ = QtConcurrent::run(std::bind(&OrganiseDialog::LoadSongsBlocking, this, filenames));
   NewClosure(songs_future_, [=]() { SetSongs(songs_future_.result()); });
 
   SetLoadingSongs(true);