SDL_ttf: update vendored harfbuzz (15974)

From 15974343dc9b171d10313ca79e1221e0e911a722 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Sat, 25 Oct 2025 12:11:10 +0300
Subject: [PATCH] update vendored harfbuzz

(cherry picked from commit 0a6303f4c7839b9f17d77036aa5fdde0e78db396)
---
 external/harfbuzz | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/external/harfbuzz b/external/harfbuzz
index 06235fc6..950d232c 160000
--- a/external/harfbuzz
+++ b/external/harfbuzz
@@ -1 +1 @@
-Subproject commit 06235fc62fca98d185c2872d206106710d093c48
+Subproject commit 950d232cdcd29e2e83a2099307e5624a8f1aa937