fix: syntax error in testProvision_RevertWhen_OperatorNotAuthorized function

Author: MoonBoi9001

packages/horizon/test/staking/provision/provision.t.sol

@@ -104,7 +104,7 @@ contract HorizonStakingProvisionTest is HorizonStakingTest {
             "HorizonStakingNotAuthorized(address,address,address)",
             subgraphDataServiceAddress,
             users.operator,
-            users.indexer,
+            users.indexer
         );
         vm.expectRevert(expectedError);
         staking.provision(users.indexer, subgraphDataServiceAddress, amount, maxVerifierCut, thawingPeriod);