fix: use new nomenclature for staking contract in address book

Signed-off-by: Tomás Migone <[email protected]>

Author: tmigone

config/arbitrumSepoliaAddressScript.ts

@@ -13,8 +13,8 @@ export let addresses: Addresses = {
   graphToken: '{{arbsep.L2GraphToken.address}}',
   epochManager: '{{arbsep.EpochManager.address}}',
   disputeManager: '{{arbsep.DisputeManager.address}}',
-  staking: '{{arbsep.L2Staking.address}}',
-  stakingExtension: '{{arbsep.StakingExtension.address}}',
+  staking: '{{arbsep.HorizonStaking.address}}',
+  stakingExtension: '{{arbsep.HorizonStaking.address}}',
   curation: '{{arbsep.L2Curation.address}}',
   rewardsManager: '{{arbsep.RewardsManager.address}}',
   serviceRegistry: '{{arbsep.ServiceRegistry.address}}',