update header

Author: hossam-nasr

articles/azure-functions/durable/durable-functions-node-model-upgrade.md

@@ -867,7 +867,7 @@ Below are some of the new exported types:
 
 :::zone-end
 
-# Troubleshooting
+## Troubleshooting
 
 If you see the following error when running your orchestration code, make sure you are running on the at least `v4.16.5` of the [Azure Functions Runtime](../functions-versions.md?tabs=v4&pivots=programming-language-javascript) or at least `v4.0.5095` of [Azure Functions Core Tools](../functions-run-local.md?tabs=v4) if running locally.