fix link

Author: brozorec

content/stellar-contracts/index.mdx

@@ -18,7 +18,7 @@ Explore our comprehensive suite of secure and scalable smart contract utilities
 
 *   **[Pausable](/stellar-contracts/utils/pausable)**: Pause and unpause contract functions, useful for emergency response.
 *   **[Upgradeable](/stellar-contracts/utils/upgradeable)**: Manage contract upgrades and data migrations seamlessly.
-*   **[Cryptography](/stellar-contracts/utils/crypto)**: A set of cryptographic primitives and utilities for Soroban contracts.
+*   **[Cryptography](/stellar-contracts/utils/crypto/crypto)**: A set of cryptographic primitives and utilities for Soroban contracts.
 
 ## Security and Audits