[Update][NSIS] Use single string shell invocation (#6986)

Took 18 minutes

Took 2 minutes

Co-authored-by: Lukas Brübach <Bruebach.Lukas@bdosecurity.de>
(cherry picked from commit 7aaacbf347)

.github/workflows/desktop-build.yml

@@ -331,7 +331,7 @@ jobs:
             target: 10
             runner: windows-2025
             
-            cmake_generator: "Visual Studio 17 2022"
+            cmake_generator: "Visual Studio 18 2026"
             cmake_generator_platform: x64
             make_package: 1
             package_suffix: "-Win10"

cockatrice/src/interface/widgets/dialogs/dlg_update.cpp

@@ -220,9 +220,8 @@ void DlgUpdate::downloadSuccessful(const QUrl &filepath)
 {
     setLabel(tr("Installing..."));
     // Try to open the installer. If it opens, quit Cockatrice
-    if (QProcess::startDetached(filepath.toLocalFile(),
-                                QStringList()
-                                    << "/R" << QString("/D=%1").arg(QCoreApplication::applicationDirPath()))) {
+    if (QProcess::startDetached(
+            QString("\"%1\" /R /D=\"%2\"").arg(filepath.toLocalFile(), QCoreApplication::applicationDirPath()))) {
         QMetaObject::invokeMethod(static_cast<MainWindow *>(parent()), "close", Qt::QueuedConnection);
         qCInfo(DlgUpdateLog) << "Opened downloaded update file successfully - closing Cockatrice";
         close();