Add a changelog entry for PR #3266

CHANGELOG.md

diff --git a/CHANGELOG.md b/CHANGELOG.md
index d743ef8..4fe2234 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,6 +19,7 @@
 * Apply patch to SVT-AV1 with AVIF_CODEC_SVT=LOCAL to fix corrupted encoded
   files when SVT-AV1 is built with MSVC. See
   https://github.com/AOMediaCodec/libavif/issues/3255.
+* Link with -lm when NOT WIN32 AND NOT APPLE
 
 ## [1.4.2] - 2026-05-26