Prepare 19.6.1 release. #1333

Job	Run time
ruff	7s
mypy	23s
sdist	46s
parse_sdl (windows-latest, 3.2.16)	46s
parse_sdl (macos-latest, 3.2.16)	30s
pyodide	2m 44s
linux-wheels (x86_64, cp310-manylinux*)	4m 4s
build-macos (pp310-*)	3m 50s
linux-wheels (x86_64, pp310-manylinux*)	3m 33s
tox (ubuntu-latest)	2m 53s
test-docs	2m 10s
build-macos (cp310-*_universal2)	2m 10s
linux-wheels (aarch64, pp310-manylinux*)	3m 29s
linux-wheels (aarch64, cp310-manylinux*)	4m 12s
build (ubuntu-latest, pypy-3.10, x64)	3m 1s
build (ubuntu-latest, 3.10, x64)	3m 57s
build (windows-latest, 3.10, x86)	4m 9s
build (windows-latest, 3.10, x64)	3m 6s
build (windows-latest, pypy-3.10, x64)	3m 33s
publish	42s
	50m 5s

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