Change default threading model for COM objects

It shouldn't matter much but it could avoid some conflicts with other libraries in the future (like `tinyfiledialogs`).

src/raudio.c

@@ -168,6 +168,10 @@ typedef struct tagBITMAPINFOHEADER {
 #define MA_NO_WAV
 #define MA_NO_FLAC
 #define MA_NO_MP3
+
+// Threading model: Default: [0] COINIT_MULTITHREADED: COM calls objects on any thread (free threading)
+#define MA_COINIT_VALUE  2              // [2] COINIT_APARTMENTTHREADED: Each object has its own thread (apartment model)
+
 #define MINIAUDIO_IMPLEMENTATION
 //#define MA_DEBUG_OUTPUT
 #include "external/miniaudio.h"         // Audio device initialization and management