Add Dynatrace in monitoring category

diagrams/onprem/monitoring.py

@@ -15,6 +15,8 @@ class Cortex(_Monitoring):
 class Datadog(_Monitoring):
     _icon = "datadog.png"
 
+class Dynatrace(_Monitoring):
+    _icon = "dynatrace.png"
 
 class Grafana(_Monitoring):
     _icon = "grafana.png"

docs/nodes/onprem.md

@@ -152,6 +152,7 @@ Node classes list of onprem provider.
 
 - **diagrams.onprem.monitoring.Cortex**
 - **diagrams.onprem.monitoring.Datadog**
+- **diagrams.onprem.monitoring.Dynatrace**
 - **diagrams.onprem.monitoring.Grafana**
 - **diagrams.onprem.monitoring.Humio**
 - **diagrams.onprem.monitoring.Newrelic**