Update README.md

Author: denji

README.md

@@ -6,7 +6,7 @@ Description:
 
 The Nginx HMAC secure link module enhances the security and functionality of the standard secure link module.  
 Secure token is created using secure HMAC construction with an arbitrary hash algorithm supported by OpenSSL, e.g.:
-`blake2b512`, `blake2s256`, `gost`, `md4`, `md5`, `rmd160`, `sha1`, `sha224`, `sha256`,
+`blake2b512`, `blake2s256`, `gost`, `md4`, `md5`, `mdc2`, `rmd160`, `sha1`, `sha224`, `sha256`,
 `sha3-224`, `sha3-256`, `sha3-384`, `sha3-512`, `sha384`, `sha512`, `sha512-224`, `sha512-256`, `shake128`, `shake256`, `sm3`.
 
 Furthermore, secure token is created as described in RFC2104, that is,