Apply suggestions from code review

components/Starknet/modules/architecture_and_concepts/pages/Network_Architecture/fee-mechanism.adoc

@@ -246,6 +246,6 @@ When a transaction that raises the `deploy` syscall is included in a state updat
 * class hash
 
 The first two elements are counted in the number of unique modified contracts, denoted by stem:[$n$] throughout this page, such as with stem:[$n\ge\ell$]. So the only additional comes from publishing the class hash,
-which adds 551 gas. For more information, see stem:[$\text{calldata_cost}$] in xref:#fee_limitations[Fee limitations].
+which adds 551 gas. For more information, see stem:[$\text{da_calldata_cost}$] and stem:[$\text{message_calldata_cost}$] in xref:#l_2-l_1_messages[Onchain data: L2->L1 messages].