Commit 689d0c39 for libheif

commit 689d0c39cdc38ce6978af91ecfaf34a52692ccc1
Author: Wan-Teh Chang <wtc@google.com>
Date:   Tue Sep 22 18:13:56 2026 -0700

    Update to libaom v3.15.1

diff --git a/third-party/aom.cmd b/third-party/aom.cmd
index 8a2b4a52..9a39d8e6 100644
--- a/third-party/aom.cmd
+++ b/third-party/aom.cmd
@@ -10,7 +10,7 @@
 : # If you're running this on Windows, be sure you've already run this (from your VC2019 install dir):
 : #     "C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Auxiliary\Build\vcvars64.bat"

-git clone -b v3.15.0 --depth 1 https://aomedia.googlesource.com/aom
+git clone -b v3.15.1 --depth 1 https://aomedia.googlesource.com/aom

 cd aom