Fix case (minor)
diff --git a/include/avif/avif.h b/include/avif/avif.h
index f69a833..e54e45f 100644
--- a/include/avif/avif.h
+++ b/include/avif/avif.h
@@ -370,7 +370,7 @@
double duration; // in seconds (durationInTimescales / timescale)
uint64_t durationInTimescales; // duration in "timescales"
- // The width and height as reported by the AVIf container, if any. There is no guarantee
+ // The width and height as reported by the AVIF container, if any. There is no guarantee
// these match the decoded images; they are merely reporting what is independently offered
// from the container's boxes.
// * If decoding an "item" and the item is associated with an ImageSpatialExtentsBox,
