headers: forbid the use of WindowsInspectString in winstore builds

https://docs.microsoft.com/en-us/windows/win32/api/winstring/nf-winstring-windowsinspectstring
Signed-off-by: Liu Hao <lh_mouse@126.com>
diff --git a/mingw-w64-headers/include/winstring.h b/mingw-w64-headers/include/winstring.h
index 76131d8..d3febc4 100644
--- a/mingw-w64-headers/include/winstring.h
+++ b/mingw-w64-headers/include/winstring.h
@@ -53,7 +53,9 @@
 
 typedef HRESULT (WINAPI *PINSPECT_HSTRING_CALLBACK)(void *context, UINT_PTR readAddress, UINT32 length, BYTE *buffer);
 
+#if WINAPI_FAMILY_PARTITION (WINAPI_PARTITION_DESKTOP)
 HRESULT WINAPI WindowsInspectString(UINT_PTR targetHString, USHORT machine, PINSPECT_HSTRING_CALLBACK callback, void *context, UINT32 *length, UINT_PTR *targetStringAddress);
+#endif
 
 BOOL WINAPI WindowsIsStringEmpty(HSTRING string);