package/sdl2: bump version to 2.26.3

Update the license hash because of a change in copyright year:
- Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
+ Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>

Signed-off-by: Michael Fischer <mf@go-sys.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/sdl2/sdl2.hash

@@ -1,4 +1,4 @@
-# Locally calculated after checking http://www.libsdl.org/release/SDL2-2.26.2.tar.gz.sig
-sha256  95d39bc3de037fbdfa722623737340648de4f180a601b0afad27645d150b99e0  SDL2-2.26.2.tar.gz
+# Locally calculated after checking http://www.libsdl.org/release/SDL2-2.26.3.tar.gz.sig
+sha256  c661205a553b7d252425f4b751ff13209e5e020b876bbfa1598494af61790057  SDL2-2.26.3.tar.gz
 # Locally calculated
-sha256  fcb07e07ac6bc8b2fcf047b50431ef4ebe5b619d7ca7c82212018309a9067426  LICENSE.txt
+sha256  9928507f684c1965d07f2b6ef4b4723d5efc2f6b4ab731f743a413c51c319927  LICENSE.txt

package/sdl2/sdl2.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-SDL2_VERSION = 2.26.2
+SDL2_VERSION = 2.26.3
 SDL2_SOURCE = SDL2-$(SDL2_VERSION).tar.gz
 SDL2_SITE = http://www.libsdl.org/release
 SDL2_LICENSE = Zlib