Update comment in avif.h about libyuv usage
We use libyuv for 10 bit now and add RGB_565 format as well to the
list of RGB formats for which libyuv is used.
diff --git a/include/avif/avif.h b/include/avif/avif.h
index 089c6fa..ced9c3e 100644
--- a/include/avif/avif.h
+++ b/include/avif/avif.h
@@ -526,10 +526,11 @@
// If libavif is built with libyuv fast paths enabled, libavif will use libyuv for conversion from
// YUV to RGB if the following requirements are met:
//
-// * YUV depth: 8
+// * YUV depth: 8 or 10
// * RGB depth: 8
// * rgb.chromaUpsampling: AVIF_CHROMA_UPSAMPLING_AUTOMATIC, AVIF_CHROMA_UPSAMPLING_FASTEST
-// * rgb.format: AVIF_RGB_FORMAT_RGBA, AVIF_RGB_FORMAT_BGRA (420/422 support for AVIF_RGB_FORMAT_ABGR, AVIF_RGB_FORMAT_ARGB)
+// * rgb.format: AVIF_RGB_FORMAT_RGBA, AVIF_RGB_FORMAT_BGRA (420/422 support for
+// AVIF_RGB_FORMAT_ABGR, AVIF_RGB_FORMAT_ARGB, AVIF_RGB_FORMAT_RGB_565)
// * CICP is one of the following combinations (CP/TC/MC/Range):
// * x/x/[2|5|6]/Full
// * [5|6]/x/12/Full