Correctly center the SDL ASCII lines #81273

Job	Run time
matrix-variables	1s
skip-duplicates-code	4s
skip-duplicates-data	4s
Basic Build and Test (Clang 10, Ubuntu, Curses)	15m 41s
Clang 14, macOS 12, Tiles, Sound, x64 and arm64 Universal Binary	1h 6m 17s
GCC 9, Curses, LTO	19m 33s
Clang 12, Ubuntu, Tiles, ASan	1h 9m 36s
GCC 11, Ubuntu, Curses, ASan	1h 21m 56s
GCC 12, Ubuntu cross-compile to MinGW-Win64, Tiles, Sound	22m 14s
GCC 9, Ubuntu, Tiles, Sound, CMake	1s
	4h 35m 27s

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