SDL_image: update README.txt for online documentation url.

From 5dfae32d7b84aba6cb98cc59f6e1a3e24d26ca35 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Tue, 7 Jan 2025 04:27:22 +0300
Subject: [PATCH] update README.txt for online documentation url.

---
 README.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.txt b/README.txt
index 0fe06b9a..6490c77d 100644
--- a/README.txt
+++ b/README.txt
@@ -25,7 +25,7 @@ To create a surface from an XPM image included in C source, use:
 
 An example program 'showimage' is included, with source in examples/showimage.c
 
-Documentation is also available online at https://wiki.libsdl.org/SDL_image
+Documentation is also available online at https://wiki.libsdl.org/SDL3_image
 
 This library is under the zlib License, see the file "LICENSE.txt" for details.