Edit testDiagram.md

testDiagram.md

 @startuml 
+```plantuml this is for tecnalia plantuml plugin
 
 !include https://git.code.tecnalia.dev/emerald/public/puml-includes/-/blob/master/roles.puml
 
@@ -42,5 +43,5 @@ end
 
 'note over InfrastruturalElementsCatalogue:Is the IOP always called by RuntimeController?
 
-
+```
 @enduml