[Qt] fix ugly typo in bitcoin.cpp

src/qt/bitcoin.cpp

@@ -595,7 +595,7 @@ int main(int argc, char *argv[])
         app.createWindow(isaTestNet);
         app.requestInitialize();
 #if defined(Q_OS_WIN) && QT_VERSION >= 0x050000
-        WinShutdownMonitor::registerShutdownBlockReason(QObject::tr("Bitcoin Core did't yet exit safely..."), (HWND)app.getMainWinId());
+        WinShutdownMonitor::registerShutdownBlockReason(QObject::tr("Bitcoin Core didn't yet exit safely..."), (HWND)app.getMainWinId());
 #endif
         app.exec();
         app.requestShutdown();