SDL_rtf: update README.txt for SDL_ttf url

From fd39b0322913b81f851e1ed2bf8c3eb34355761d Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Tue, 7 Jan 2025 04:50:28 +0300
Subject: [PATCH] update README.txt for SDL_ttf url

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

diff --git a/README.txt b/README.txt
index 65e8778..0c4c763 100644
--- a/README.txt
+++ b/README.txt
@@ -7,7 +7,7 @@ http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnrtfspec/html/
 
 The showrtf example application relies on the SDL_ttf library for loading
 fonts and displaying text.
-The SDL_ttf library can be found at: http://www.libsdl.org/projects/SDL_rtf/
+The SDL_ttf library can be found at: https://github.com/libsdl-org/SDL_ttf
 
 To make the library, type './configure' then 'make' to build the SDL rtf
 library and the showrtf example application.