chore(deps): update rust crate clap_mangen to v0.2.26 #377

Job	Run time
Code Coverage (ubuntu-latest, unix)	1m 38s
cargo clippy -- -D warnings (ubuntu-latest)	17s
cargo fmt --all -- --check	11s
Code Coverage (macos-latest, macos)	1m 58s
cargo check (ubuntu-latest)	17s
cargo clippy -- -D warnings (macOS-latest)	18s
Code Coverage (windows-latest, windows)	3m 49s
cargo check (macOS-latest)	22s
cargo clippy -- -D warnings (windows-latest)	1m 5s
cargo check (windows-latest)	1m 2s
cargo test (ubuntu-latest)	25s
cargo test (macOS-latest)	25s
cargo test (windows-latest)	1m 14s
	13m 1s

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