Fix typo in BSIP 38

Author: abitmore

bsip-0038.md

@@ -295,7 +295,7 @@ collateral ratio" option.
 ## `call_order_update_evaluator`
 
 The `call_order_update_evaluator` is used to evaluate and apply the
-`call_order_udpate_operation`. Need to add logic:
+`call_order_update_operation`. Need to add logic:
 * only allow `target_collateral_ratio` to be set after the hard fork;
 * set/update/clear `target_collateral_ratio` field of `call_order_object`
   accordingly. Specifically,
@@ -306,7 +306,7 @@ The `call_order_update_evaluator` is used to evaluate and apply the
 
 The `proposal_create_evaluator` is used to evaluate and apply the
 `proposal_create_operation`, which can contain zero or more
-`call_order_udpate_operation` objects. Need to add logic:
+`call_order_update_operation` objects. Need to add logic:
 * only allow `target_collateral_ratio` to be set after the hard fork.
 
 ## Call Order Matching and Filling