hash_collections: Fix the documentation of `Set::new`
hash_collections: Fix the documentation of `Set::new`

Signed-off-by: Jean-Christophe Beaupré <d216d27c3e0e4d1582b1ceb6671dbc7af421ff69@users.noreply.github.com>

privat/nit,privat/nit,privat/nit,jcbrinfo/nit,jcbrinfo/nit,jcbrinfo/nit,privat/nit,privat/nit,privat/nit,privat/nit,privat/nit,jcbrinfo/nit,jcbrinfo/nit,jcbrinfo/nit,jcbrinfo/nit,jcbrinfo/nit,privat/nit,jcbrinfo/nit,privat/nit,jcbrinfo/nit,jcbrinfo/nit