Commit 7fa8b234 for libheif

commit 7fa8b234d1a34d20df5903795cefad8a36c1c622
Author: Wan-Teh Chang <wtc@google.com>
Date:   Fri Jan 2 10:15:26 2026 -0800

    Update to the dav1d 1.5.3 release

    See https://code.videolan.org/videolan/dav1d/-/releases/1.5.3.

diff --git a/third-party/dav1d.cmd b/third-party/dav1d.cmd
index fc3fdafb..3bb5be6f 100644
--- a/third-party/dav1d.cmd
+++ b/third-party/dav1d.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 1.5.0 --depth 1 https://code.videolan.org/videolan/dav1d.git
+git clone -b 1.5.3 --depth 1 https://code.videolan.org/videolan/dav1d.git

 cd dav1d