Update CHANGELOG for v3.15.2

Bug: 568453830
Change-Id: Iaa9accfedfe482fa17d2b10d79915da06318467f

CHANGELOG

diff --git a/CHANGELOG b/CHANGELOG
index ba1e4f6..dcaa449 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,17 +1,19 @@
-2026-10-01 v3.15.2
+2026-10-06 v3.15.2
   This release is ABI compatible with the last release. See
   https://aomedia.googlesource.com/aom/+log/v3.15.1..v3.15.2 for all the
   commits in this release.
 
   - Bug Fixes
+    * Bug 42302352: A larger frame is forced to be a key frame.
     * Bug 555350218: libaom encoder allows frame width/height to be
       different from max frame width/height when
       reduced_still_picture_header is 1.
     * Bug oss-fuzz:559019046: libaom:av1_enc_fuzzer: Bad-cast to
       PixelLevelGradientInfocompute_gradient_info_sb in
       av1_encode_sb_row.
+    * Bug oss-fuzz:566951534: Integer-overflow in linsolve_wiener.
     * Bug 568044446: Fix stale search_site_config in IntraBC motion
-      search.
+      search. Fix y_stride_src in init_motion_estimation().
 
 2026-09-21 v3.15.1
   This release is ABI compatible with the last release. See