Add link to Feedback Forum

Under OpenTelemetry feedback

Author: mattmccleary

articles/azure-monitor/app/opentelemetry-enable.md

@@ -1009,6 +1009,7 @@ To provide feedback:
 - Fill out the OpenTelemetry community's [customer feedback survey](https://docs.google.com/forms/d/e/1FAIpQLScUt4reClurLi60xyHwGozgM9ZAz8pNAfBHhbTZ4gFWaaXIRQ/viewform).
 - Tell Microsoft about yourself by joining the [OpenTelemetry Early Adopter Community](https://aka.ms/AzMonOTel/).
 - Engage with other Azure Monitor users in the [Microsoft Tech Community](https://techcommunity.microsoft.com/t5/azure-monitor/bd-p/AzureMonitor).
+- Make a feature request at the [Azure Feedback Forum](https://feedback.azure.com/d365community/forum/8849e04d-1325-ec11-b6e6-000d3a4f09d0).
 
 ## Next steps