Update architecture.mdx

Author: JohnBonny

pages/stack/interop/architecture.mdx

@@ -78,7 +78,7 @@ The second transaction creates an *executing message* on the destination chain.
 This executing message could result in a contract function being executed on the destination chain.
 
 The initiating message is simply a log event.
-Any log event on any chain that inteoperates with the destination can initiate a cross domain message.
+Any log event on any chain that interoperates with the destination can initiate a cross domain message.
 
 The transaction that receives the message on the destination chain calls a contract called [`CrossL2Inbox`](https://specs.optimism.io/interop/predeploys.html#crossl2inbox).
 This call can be at the top level, directly from the externally owned account, or come through a smart contract.