Fix cross from Linux to Windows

specifies Windows 7 required

https://learn.microsoft.com/en-us/cpp/porting/modifying-winver-and-win32-winnt?view=msvc-170

closes https://github.com/official-stockfish/Stockfish/pull/5319

No functional change

src/numa.h

@@ -42,6 +42,11 @@
     #include <sched.h>
 #elif defined(_WIN64)
 
+    #if _WIN32_WINNT < 0x0601
+        #undef _WIN32_WINNT
+        #define _WIN32_WINNT 0x0601  // Force to include needed API prototypes
+    #endif
+
 // On Windows each processor group can have up to 64 processors.
 // https://learn.microsoft.com/en-us/windows/win32/procthread/processor-groups
 static constexpr size_t WIN_PROCESSOR_GROUP_SIZE = 64;