Easy fix for broken watchers (#1121)

* Easy fix for broken watchers

* Ran yarn changeset
Co-authored-by: Liam Horne <liam@lihorne.com>

.changeset/old-wombats-tie.md

+---
+'@eth-optimism/core-utils': patch
+---
+
+Minor fix on watchers to pick up finalization of transactions on L1

packages/core-utils/src/watcher.ts

@@ -33,7 +33,7 @@ export class Watcher {
     l2ToL1MsgHash: string,
     pollForPending: boolean = true
   ): Promise<TransactionReceipt> {
-    return this.getTransactionReceipt(this.l2, l2ToL1MsgHash, pollForPending)
+    return this.getTransactionReceipt(this.l1, l2ToL1MsgHash, pollForPending)
   }
 
   public async getL2TransactionReceipt(