update randomness_handler

drivers/randomness_handler/Cargo.toml

@@ -7,4 +7,4 @@ edition = "2021"
 
 [dependencies]
 versioning = { path = "../../libraries/versioning" }
-rand = { path = "../../libraries/rand" }
+cryptography = { path = "../../libraries/cryptography" }

drivers/randomness_handler/src/main.rs

@@ -1,6 +1,6 @@
 #![no_std]
 #![no_main]
-use rand::Csprng;
+use cryptography::random::Csprng;
 use versioning::Version;
 pub const VERSION: Version = Version::new(0, 1, 0);