qlocale_win.cpp: Fix unity-build

Error after commit f039077:
.../qtbase/src/corelib/text/qlocale_win.cpp(745):
 error C2872: 'Windows': ambiguous symbol

C:\Program Files (x86)\Windows Kits\10\include\10.0.26100.0\winrt\wrl/
client.h(927): note: could be 'Windows'

C:\Program Files (x86)\Windows Kits\10\include\10.0.26100.0\cppwinrt\
winrt/Windows.System.UserProfile.h(890): note: or 'winrt::Windows'

Amends 51e8d35

Change-Id: Ia32faa86bee6a284a5ad50ed82dcf8f08ab28dfd
Reviewed-by: Ivan Solovev <[email protected]>

Author: tnodir

src/corelib/text/qlocale_win.cpp

@@ -741,8 +741,7 @@ QVariant QSystemLocalePrivate::uiLanguages()
 {
     QStringList result;
 #if QT_CONFIG(cpp_winrt)
-    using namespace winrt;
-    using namespace Windows::System::UserProfile;
+    using namespace winrt::Windows::System::UserProfile;
     QT_TRY {
         auto languages = GlobalizationPreferences::Languages();
         for (const auto &lang : languages)