fix a few typos in readme file (#411)

README.md

@@ -57,7 +57,7 @@ This is why we publish our MD5 implementation as `md-5` and mark it with the :ex
 Note that the library itself is named as `md5`, i.e. inside `use` statements you should use `md5`, not `md_5`.
 
 The SHA-1 implementation was previously published as `sha-1`, but migrated to `sha1` since v0.10.0.
-`sha-1` will continue to recieve v0.10.x patch updates, but will be deprecated after `sha1` v0.11 release.
+`sha-1` will continue to receive v0.10.x patch updates, but will be deprecated after `sha1` v0.11 release.
 
 ### Minimum Supported Rust Version (MSRV) Policy
 
@@ -132,7 +132,7 @@ let hash = Sha256::digest(b"my message");
 
 ### Hashing `Read`able Objects
 
-If you want to hash data from a type which imlements the [`Read`] trait, you can rely on implementation of the [`Write`] trait (requires enabled-by-default `std` feature):
+If you want to hash data from a type which implements the [`Read`] trait, you can rely on implementation of the [`Write`] trait (requires enabled-by-default `std` feature):
 
 ```rust
 use sha2::{Sha256, Digest};