Make Blake2s API public (#2286)

* Make Blake2s API public

* Update CHANGELOG

Author: gabrielbosio

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 #### Upcoming Changes
 
+* feat: Make Blake2s API public [#2286](https://github.com/lambdaclass/cairo-vm/pull/2286)
+
 * feat: implemented delete_unaccessed function [#2282](https://github.com/lambdaclass/cairo-vm/pull/2282)
 
 * fix: rename y_cube_int to y_square_int in get_point_from_x [#2271](https://github.com/lambdaclass/cairo-vm/pull/2271)

vm/src/hint_processor/builtin_hint_processor/mod.rs

@@ -1,6 +1,6 @@
 pub mod bigint;
-pub(crate) mod blake2s_hash;
-mod blake2s_utils;
+pub mod blake2s_hash;
+pub mod blake2s_utils;
 pub mod builtin_hint_processor_definition;
 pub mod cairo_keccak;
 pub mod dict_hint_utils;