repl: fixup error message

Use "cmd.action" instead of just "action" for ERR_INVALID_ARG_TYPE

Signed-off-by: James M Snell <jasnell@gmail.com>

PR-URL: #32474
Reviewed-By: Anto Aravinth <anto.aravinth.cse@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>

lib/repl.js

@@ -1447,7 +1447,7 @@ REPLServer.prototype.defineCommand = function(keyword, cmd) {
   if (typeof cmd === 'function') {
     cmd = { action: cmd };
   } else if (typeof cmd.action !== 'function') {
-    throw new ERR_INVALID_ARG_TYPE('action', 'Function', cmd.action);
+    throw new ERR_INVALID_ARG_TYPE('cmd.action', 'Function', cmd.action);
   }
   this.commands[keyword] = cmd;
 };