Fix a few grammatical errors
diff --git a/include/avif/avif.h b/include/avif/avif.h
index 77e8249..61f2904 100644
--- a/include/avif/avif.h
+++ b/include/avif/avif.h
@@ -17,7 +17,7 @@
// AVIF_BUILDING_SHARED_LIBS should only be defined when libavif is being built
// as a shared library.
// AVIF_DLL should be defined if libavif is a shared library. If you are using
-// libavif as CMake dependency, through CMake package config file or through
+// libavif as a CMake dependency, through a CMake package config file or through
// pkg-config, this is defined automatically.
//
// Here's what AVIF_API will be defined as in shared build:
@@ -567,7 +567,7 @@
typedef enum avifChromaUpsampling
{
AVIF_CHROMA_UPSAMPLING_AUTOMATIC = 0, // Chooses best trade off of speed/quality (uses BILINEAR libyuv if available,
- // or fallbacks to NEAREST libyuv if available, or fallbacks to BILINEAR built-in)
+ // or falls back to NEAREST libyuv if available, or falls back to BILINEAR built-in)
AVIF_CHROMA_UPSAMPLING_FASTEST = 1, // Chooses speed over quality (same as NEAREST)
AVIF_CHROMA_UPSAMPLING_BEST_QUALITY = 2, // Chooses the best quality upsampling, given settings (same as BILINEAR)
AVIF_CHROMA_UPSAMPLING_NEAREST = 3, // Uses nearest-neighbor filter
