Bump WASI SDK to version 22 #668

Job	Run time
ci-data	6s
Compile native gem for aarch64-linux-musl	5m 57s
Compile native gem for aarch64-linux	5m 53s
Compile native gem for arm64-darwin	5m 54s
Compile native gem for x86_64-darwin	5m 43s
Compile native gem for x86_64-linux	9m 0s
Compile native gem for aarch64-mingw-ucrt	2m 28s
Compile native gem for x64-mingw-ucrt	6m 1s
Compile native gem for x86_64-linux-musl	5m 49s
	46m 51s

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