rename PER_CONTRACT_CODE_BASE_COST to PER_AUTH_BASE_COST

EIPS/eip-7702.md

@@ -68,7 +68,7 @@ Note that the signer of an authorization tuple may be different than `tx.origin`
 
 #### Gas Costs
 
-The intrinsic cost of the new transaction is inherited from [EIP-2930](./eip-2930.md), specifically `21000 + 16 * non-zero calldata bytes + 4 * zero calldata bytes + 1900 * access list storage key count + 2400 * access list address count`. Additionally, we add a cost of `PER_CONTRACT_CODE_BASE_COST * authorization list length`.
+The intrinsic cost of the new transaction is inherited from [EIP-2930](./eip-2930.md), specifically `21000 + 16 * non-zero calldata bytes + 4 * zero calldata bytes + 1900 * access list storage key count + 2400 * access list address count`. Additionally, we add a cost of `PER_AUTH_BASE_COST * authorization list length`.
 
 The transaction sender will pay for all authorization tuples, regardless of validity or duplication.