fix: Make alg enum exhaustive #4296

Job	Run time
Unit tests (windows-latest, stable)	5m 59s
Default features build	25s
Unit tests (windows-latest, 1.82.0)	4m 5s
Unit tests (macos-latest, stable)	3m 9s
Doc tests (requires nightly Rust) (windows-latest)	4m 1s
Unit tests (c2patool) (windows-latest, stable)	3m 52s
Unit tests (macos-latest, 1.82.0)	3m 1s
Clippy	1m 17s
Doc tests (requires nightly Rust) (macos-latest)	45s
Unit tests (c2patool) (macos-latest, stable)	57s
Unit tests (ubuntu-latest, stable)	2m 25s
Doc tests (requires nightly Rust) (ubuntu-latest)	1m 23s
Unit tests (c2patool) (ubuntu-latest, stable)	53s
Unit tests (ubuntu-latest, 1.82.0)	2m 19s
Unit tests (aarch64-unknown-linux-gnu, stable)	8m 15s
Unit tests (WASM)	3m 15s
Unit tests (aarch64-unknown-linux-gnu, 1.82.0)	8m 13s
Unit tests with minimum versions of direct dependencies (windows-latest)	3m 46s
Unit tests with minimum versions of direct dependencies (macos-latest)	1m 40s
Unit tests with minimum versions of direct dependencies (ubuntu-latest)	1m 23s
Enforce Rust code format	14s
License / vulnerability audit (advisories)	24s
License / vulnerability audit (bans licenses sources)	24s
Preflight docs.rs build	2m 14s
Check for unused dependencies	2m 34s
	1h 6m 53s

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