sdl12-compat: LICENSE.txt: Updated copyright for 2022.

From 3dfc526095ae3bd245529f8925dc326777902340 Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Thu, 1 Sep 2022 19:15:55 -0400
Subject: [PATCH] LICENSE.txt: Updated copyright for 2022.

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

diff --git a/LICENSE.txt b/LICENSE.txt
index 04694607b..a41260a29 100644
--- a/LICENSE.txt
+++ b/LICENSE.txt
@@ -1,4 +1,4 @@
-Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
+Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.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