chore: fix coding style

src/backend.cpp

@@ -341,8 +341,7 @@ void Backend::runDemoProject(const QString &projectName)
     if (projectList == std::nullopt) {
         qCritical()
             << "Could not fetch demo project list. Please check your internet connection and "
-               "try "
-               "again.";
+               "try again.";
         emit popupClose();
         return;
     }