Fix `clippy:manual_clamp` lint. #90

Job	Run time
cargo check (aarch64-android)	1m 41s
cargo fmt	26s
cargo test (wasm32)	59s
cargo check (msrv) (windows-latest)	2m 47s
cargo check (msrv) (wasm32)	1m 7s
cargo check (msrv) (macos-latest)	1m 26s
cargo doc	1m 10s
cargo check (msrv) (ubuntu-latest)	58s
cargo clippy + test (windows-latest)	6m 30s
cargo clippy + test (macos-14)	3m 4s
cargo clippy + test (ubuntu-latest)	3m 30s
	23m 38s

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