Change wording in CHANGELOG.md

[skip ci]
diff --git a/CHANGELOG.md b/CHANGELOG.md
index b2c5e27..7779c48 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -27,7 +27,7 @@
   and avifRGBImage::avoidLibYUV to AVIF_TRUE.
 * avifRGBImage::chromaUpsampling now only applies to conversions that need
   upsampling chroma from 4:2:0 or 4:2:2 and has no impact on the use of libyuv.
-  Set avifRGBImage::avoidLibYUV accordingly for that.
+  Set avifRGBImage::avoidLibYUV accordingly to control the use of libyuv.
 * Exif and XMP metadata is imported from PNG and JPEG files.
 
 ### Removed
@@ -40,7 +40,7 @@
 * Add imageDimensionLimit field to avifDecoder struct
 * Add autoTiling field to avifEncoder struct
 * Add AVIF_CHROMA_DOWNSAMPLING_SHARP_YUV value to avifChromaDownsampling enum
-* Add avifImageExtractExifOrientationToIrotImir() which parses the Exif payload
+* Add avifImageExtractExifOrientationToIrotImir() which parses the Exif metadata
   of an image and converts any Exif orientation found into transformFlags, irot
   and imir values.
 * avifdec: Add --dimension-limit, which specifies the image dimension limit