Update onCaughtError interceptor

Would be nice to do this via onCaughtError but I copying the full impl of `defaultOnCaughtError` seems sketchy.
See https://vercel.slack.com/archives/C04TR3U872A/p1713969391445789 for quick proposal

packages/next/src/client/app-index.tsx

@@ -19,7 +19,8 @@ import { HMR_ACTIONS_SENT_TO_BROWSER } from '../server/dev/hot-reloader-types'
 // Since React doesn't call onerror for errors caught in error boundaries.
 const origConsoleError = window.console.error
 window.console.error = (...args) => {
-  if (isNextRouterError(args[0])) {
+  // error is the second argument to `console.error`: https://github.com/facebook/react/blob/d50323eb845c5fde0d720cae888bf35dedd05506/packages/react-reconciler/src/ReactFiberErrorLogger.js#L78
+  if (isNextRouterError(args[1])) {
     return
   }
   origConsoleError.apply(window.console, args)