Fix code example to match help text
Fix code example to match help text

Signed-off-by: Christoph Prokop <70dfdc45530531c5127c33c54bad1572080dedf3@mailbox.org>
Signed-off-by: Matthias Beyer <1d6e1cf70ec6f9ab28d3ea4b27a49a77654d370e@beyermatthias.de>
Reviewed-by: Matthias Beyer <1d6e1cf70ec6f9ab28d3ea4b27a49a77654d370e@beyermatthias.de>

clap-rs/clap,clap-rs/clap,clap-rs/clap