Update architecture.mdx

Updating broken proxyd link

Author: praetoriansentry

pages/builders/chain-operators/architecture.mdx

@@ -56,7 +56,7 @@ requests from your users. The Sequencer node has the important job of working wi
 the batcher to handle block creation. To allow the Sequencer to focus on that job,
 you can peer replica nodes to handle the rest of the work.
 
-An example of this would be to configure [proxyd](https://github.com/ethereum-optimism/optimism/tree/develop/proxyd)
+An example of this would be to configure [proxyd](https://github.com/ethereum-optimism/infra/tree/main/proxyd)
 to route RPC methods, retry failed requests, load balance, etc. Users sending
 `eth_sendRawTransaction` requests can have their requests forwarded directly to the
 Sequencer. All other RPC requests can be forwarded to replica nodes.