use callout

Author: ozgunozerk

content/stellar-contracts/tokens/vault/vault.mdx

@@ -146,11 +146,13 @@ The vault module implements the ERC-4626 tokenized vault standard with one minor
 
 ### ERC-4626 Deviation
 
-⚠️ **DEVIATION FROM ERC-4626**: The `query_asset()` function will panic if the asset address is not set, whereas ERC-4626 requires it to never revert.
+<Callout type="warning">
+**DEVIATION FROM ERC-4626**: The `query_asset()` function will panic if the asset address is not set, whereas ERC-4626 requires it to never revert.
 
 **Rationale**: Soroban doesn't have a "zero address" concept like EVM. Returning `Option<Address>` would break ERC-4626 compatibility.
 
 **Mitigation**: Always initialize the vault properly in the constructor. Once initialized, `query_asset()` will never panic during normal operations.
+</Callout>
 
 Aside from this deviation, the vault implementation for Soroban provides: