C-API

chore(deps): update install-pinned/maturin digest to 18a9a3b #552

Job	Run time
Build and test (ubuntu-22.04)	1m 9s
Build and test (macos-latest)	1m 19s
Test generated C header	1m 9s
Ensure C-API crate version is in sync	3s
	3m 40s

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