Merge rust-bitcoin#4923: docs: fix typos

045f8f9 docs: fix typos (VolodymyrBg)

Pull request description:

  some minor typos: 
  bitcoin::cryto::key -> bitcoin::crypto::key (cryto-crypto)
  PriviateKey > PrivateKey


ACKs for top commit:
  apoelstra:
    ACK 045f8f9; successfully ran local tests


Tree-SHA512: bd7ba2c58e9d6c58ce8197ffd41da5022b4509fb9585e46585d157ce0a710aededd28430b6b1fd9acab914e32cf90a64e5759be02fb8812022a9c8d7d02438dc

Author: apoelstra

docs/crypto.md

@@ -29,7 +29,7 @@ The reason for splitting this out is so that other crates can depend on keys wit
 (Note plural for crate name and singular for current module name, in line with what we did for
 `address` module and `addresses` crate.)
 
-Current public types in `bitcoin::cryto::key`:
+Current public types in `bitcoin::crypto::key`:
 
 - `XOnlyPublicKey`
 - `PublicKey`
@@ -50,7 +50,7 @@ Looking at `bitcoin::crypto::key` there are some obvious things that will need f
 
 #### `NetworkKind`
 
-Currently we are using `bitcoin::network::NetworkKind` in `PriviateKey`.
+Currently we are using `bitcoin::network::NetworkKind` in `PrivateKey`.
 
 - Used to get the first byte of WIF format
 - Passed to functions that create addresses e.g., `Address::p2pkh(key, network)`