SDL_shader_tools: LICENSE: bump copyright date to 2023.

From e52d75a1358a8817eb214be03ef5f9ebe1f10118 Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Fri, 27 Jan 2023 09:04:40 -0500
Subject: [PATCH] LICENSE: bump copyright date to 2023.

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

diff --git a/LICENSE.txt b/LICENSE.txt
index 00c788f..217cca4 100644
--- a/LICENSE.txt
+++ b/LICENSE.txt
@@ -1,4 +1,4 @@
-Copyright (c) 2022 Ryan C. Gordon <icculus@icculus.org>.
+Copyright (c) 2022-2023 Ryan C. Gordon <icculus@icculus.org>.
   
 This software is provided 'as-is', without any express or implied
 warranty.  In no event will the authors be held liable for any damages