Add a couple more lines to functions node v4 troubleshooting

Author: ejizba

articles/azure-functions/functions-node-upgrade-v4.md

@@ -364,3 +364,10 @@ The http request and response types are now a subset of the [fetch standard](htt
 If you see the following error, make sure you [set the `EnableWorkerIndexing` flag](#enable-v4-programming-model) and you're using the minimum version of all [requirements](#requirements):
 
 > No job functions found. Try making your job classes and methods public. If you're using binding extensions (e.g. Azure Storage, ServiceBus, Timers, etc.) make sure you've called the registration method for the extension(s) in your startup code (e.g. builder.AddAzureStorage(), builder.AddServiceBus(), builder.AddTimers(), etc.).
+
+If you see the following error, make sure you're using Node.js version 18.x:
+
+> System.Private.CoreLib: Exception while executing function: Functions.httpTrigger1. System.Private.CoreLib: Result: Failure
+> Exception: undici_1.Request is not a constructor
+
+For any other issues or feedback, feel free to file an issue on our [GitHub repo](https://github.com/Azure/azure-functions-nodejs-library/issues).