sha1: fix typo (#424)

sha1/src/lib.rs

@@ -33,12 +33,12 @@
 //!
 //! This crate has been transferred to the RustCrypto organization and uses
 //! implementation previously published as the `sha-1` crate. The previous
-//! zero dependencies version is now published as the [`sha1_smoll`] crate.
+//! zero dependencies version is now published as the [`sha1_smol`] crate.
 //!
 //! [1]: https://en.wikipedia.org/wiki/SHA-1
 //! [2]: https://sha-mbles.github.io/
 //! [3]: https://github.com/RustCrypto/hashes
-//! [`sha1_smoll`]: https://github.com/mitsuhiko/sha1-smol/
+//! [`sha1_smol`]: https://github.com/mitsuhiko/sha1-smol/
 
 #![no_std]
 #![cfg_attr(docsrs, feature(doc_cfg))]