SDL_net: configure: update GUIlib url

SDL Commits
1 
From 59125f130487a03b2692aa0748ba78dd98959c93 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Tue, 21 Jun 2022 00:15:56 +0300
Subject: [PATCH] configure: update GUIlib url

---
 configure    | 4 ++--
 configure.ac | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/configure b/configure
index 1ddf2d2..fd862bf 100755
--- a/configure
+++ b/configure
@@ -17710,11 +17710,11 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
     if test x$have_GUI != xyes; then
         { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: *** Can't find the GUI library - not building test programs
 The GUI library can be found at:
-http://www.libsdl.org/projects/GUIlib/
+https://github.com/libsdl-org/GUIlib
 " >&5
 printf "%s\n" "$as_me: WARNING: *** Can't find the GUI library - not building test programs
 The GUI library can be found at:
-http://www.libsdl.org/projects/GUIlib/
+https://github.com/libsdl-org/GUIlib
 " >&2;}
     fi
 fi
diff --git a/configure.ac b/configure.ac
index 252ed76..2a2be62 100644
--- a/configure.ac
+++ b/configure.ac
@@ -207,7 +207,7 @@ if test x$enable_gui = xyes; then
     if test x$have_GUI != xyes; then
         AC_MSG_WARN([*** Can't find the GUI library - not building test programs
 The GUI library can be found at:
-http://www.libsdl.org/projects/GUIlib/
+https://github.com/libsdl-org/GUIlib 
 ])
     fi
 fi