SDL_image: libwebp: update vendored library (8a3eb)

From 8a3eb5c9ff679ccdd1eabf368bb3525141538630 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Mon, 16 Oct 2023 23:37:10 +0300
Subject: [PATCH] libwebp: update vendored library

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

diff --git a/external/libwebp b/external/libwebp
index 6d8f9015..f46de1e6 160000
--- a/external/libwebp
+++ b/external/libwebp
@@ -1 +1 @@
-Subproject commit 6d8f90152b436b059044c169266218a4a2f1d873
+Subproject commit f46de1e669658c6752fba1973517b47f5f54a7a5