SDL_image: make vendored libavif always use minimal libyuv in third_party

From 1d91d7e39d918b34cc540309dec18e6df578a7dd Mon Sep 17 00:00:00 2001
From: Anonymous Maarten <[EMAIL REDACTED]>
Date: Fri, 26 Jan 2024 23:09:20 +0100
Subject: [PATCH] make vendored libavif always use minimal libyuv in
 third_party

---
 external/libavif | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/external/libavif b/external/libavif
index 83a08f4b..6c3e45eb 160000
--- a/external/libavif
+++ b/external/libavif
@@ -1 +1 @@
-Subproject commit 83a08f4bf28db12d909a0fd70b6c48cd8ddfe0eb
+Subproject commit 6c3e45ebf22c680e8cc8f359bfd1cef560456e41