Update yellow-paper/docs/contract-deployment/classes.md

Co-authored-by: Santiago Palladino <[email protected]>

yellow-paper/docs/contract-deployment/classes.md

@@ -49,7 +49,7 @@ contract_class_id_crh(
     let private_function_leaves: Field[] = private_functions.map(|f| private_function_leaf_crh(f));
 
     // Illustrative function, not defined. TODO.
-    let private_function_tree_root: Field = merkleize(private_function_leaves);
+    let private_function_tree_root: Field = merkleize(private_function_leaves, PRIVATE_FUNCTION_TREE_HEIGHT);
 
     // Illustrative function, not defined. TODO.
     let public_bytecode_commitment: Point = calculate_commitment(packed_public_bytecode);