Portal relayer log fix (#2043)

### Description

#1970 had a small bug

### Drive-by changes

_Are there any minor or drive-by changes also included?_

### Related issues

- Fixes #[issue number here]

### Backward compatibility

_Are these changes backward compatible?_

Yes
No

_Are there any infrastructure implications, e.g. changes that would
prohibit deploying older commits using this infra tooling?_

None
Yes


### Testing

_What kind of testing have these changes undergone?_

None
Manual
Unit Tests

---------

Co-authored-by: nambrot <nambrot@googlemail.com>
Co-authored-by: J M Rossy <jm.rossy@gmail.com>

typescript/infra/scripts/middleware/portal-relayer.ts

@@ -40,7 +40,9 @@ async function relayPortalTransfers() {
 
   while (true) {
     for (const chain of Object.keys(bridgeAdapterConfigs)) {
-      log('Processing chain', chain);
+      log('Processing chain', {
+        chain,
+      });
 
       const txHashes = await app.fetchPortalBridgeTransactions(chain);
       const portalMessages = (
@@ -49,7 +51,9 @@ async function relayPortalTransfers() {
         )
       ).flat();
 
-      log('Portal messages', portalMessages);
+      log('Portal messages', {
+        portalMessages,
+      });
 
       // Poll for attestation data and submit
       for (const message of portalMessages) {