Update year

src/config.h

@@ -6,7 +6,7 @@
 *
 *   LICENSE: zlib/libpng
 *
-*   Copyright (c) 2018-2021 Ahmad Fatoum & Ramon Santamaria (@raysan5)
+*   Copyright (c) 2018-2022 Ahmad Fatoum & Ramon Santamaria (@raysan5)
 *
 *   This software is provided "as-is", without any express or implied warranty. In no event
 *   will the authors be held liable for any damages arising from the use of this software.