Use alpha builds of Pyodide supporting SDL3. #1166

Job	Run time
ruff	8s
mypy	31s
sdist	2m 44s
parse_sdl (macos-latest, 3.2.16)	26s
parse_sdl (windows-latest, 3.2.16)	46s
test-docs	3m 40s
tox (ubuntu-latest)	3m 40s
build (windows-latest, pypy-3.10, x64)	4m 58s
linux-wheels (aarch64, cp310-manylinux*)	4m 9s
build (windows-latest, 3.10, x64)	4m 13s
build (ubuntu-latest, pypy-3.10, x64)	5m 32s
linux-wheels (aarch64, pp310-manylinux*)	3m 54s
linux-wheels (x86_64, cp310-manylinux*)	4m 2s
build-macos (pp310-*)	3m 19s
build (ubuntu-latest, 3.10, x64)	5m 58s
build (windows-latest, pypy-3.10, x86)	5m 19s
pyodide	5m 28s
build (windows-latest, 3.10, x86)	4m 36s
linux-wheels (x86_64, pp310-manylinux*)	3m 37s
build-macos (cp310-*_universal2)	2m 10s
publish	0s
	1h 9m 10s

Provide feedback