MAINTAINERS: Update path to coreaudio.m

Commit 8b46d7e2dc8e ("audio: Rename coreaudio extension to use
Objective-C compiler") renamed coreaudio.c to coreaudio.m.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Reviewed-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20250111-maintainers-v1-1-faebe6ef0fec@daynix.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

MAINTAINERS

@@ -2801,7 +2801,7 @@ M: Marc-André Lureau <marcandre.lureau@redhat.com>
 S: Odd Fixes
 F: audio/
 X: audio/alsaaudio.c
-X: audio/coreaudio.c
+X: audio/coreaudio.m
 X: audio/dsound*
 X: audio/jackaudio.c
 X: audio/ossaudio.c
@@ -2823,7 +2823,7 @@ M: Philippe Mathieu-Daudé <philmd@linaro.org>
 R: Christian Schoenebeck <qemu_oss@crudebyte.com>
 R: Akihiko Odaki <akihiko.odaki@daynix.com>
 S: Odd Fixes
-F: audio/coreaudio.c
+F: audio/coreaudio.m
 
 DSound Audio backend
 M: Gerd Hoffmann <kraxel@redhat.com>