Bump thiserror from 2.0.7 to 2.0.8 #6164

Job	Run time
Check if cbindgen runs cleanly for generating the C headers	8m 18s
Check	37s
coverage	8m 55s
Lints (beta)	32s
minimum_rust_version	6m 27s
Lints (stable)	25s
Publish (on tags, dry-run otherwise)	7m 54s
test (beta)	1m 29s
test (stable)	1m 18s
test_all_features	12m 29s
Run tests under wasm32-wasi	1m 10s
Check if wasm-pack builds a valid package for the sourmash crate	1m 29s
test (windows)	4m 1s
test (macos)	1m 13s
	56m 17s

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