Fix repository URL in Cargo.toml

Author: guardsarm

Cargo.toml

@@ -5,7 +5,7 @@ edition = "2021"
 authors = ["Tony Chuks Awunor <[email protected]>"]
 description = "Memory-safe cryptographic utilities for secure key handling and encryption"
 license = "MIT"
-repository = "https://github.com/your-username/rust-crypto-utils"
+repository = "https://github.com/guardsarm/rust-crypto-utils"
 keywords = ["cryptography", "security", "encryption", "memory-safe", "financial"]
 categories = ["cryptography", "authentication"]