qt_sink: add some warning on its usage - fix

include/spdlog/sinks/qt_sinks.h

@@ -25,8 +25,6 @@ template<typename Mutex>
 class qt_sink : public base_sink<Mutex>
 {
 public:
-    // Warning: qt_sink won't be notified if the target QObject is destroyed.
-    // If the object's lifetime can be shorter than the logger's one, you should provide some permanent object and then use a standard signal/slot.
     qt_sink(QObject *qt_object, const std::string &meta_method)
     {
         qt_object_ = qt_object;
@@ -57,7 +55,11 @@ private:
 
 #include "spdlog/details/null_mutex.h"
 #include <mutex>
+// Warning: qt_sink won't be notified if the target QObject is destroyed.
+// If the object's lifetime can be shorter than the logger's one, you should provide some permanent object and then use a standard signal/slot.
 using qt_sink_mt = qt_sink<std::mutex>;
+// Warning: qt_sink won't be notified if the target QObject is destroyed.
+// If the object's lifetime can be shorter than the logger's one, you should provide some permanent object and then use a standard signal/slot.
 using qt_sink_st = qt_sink<spdlog::details::null_mutex>;
 } // namespace sinks