reverted change for Camunda / Operaton dialect

Author: schwzr

docs/src/process-development/api-v2/bpmn/index.md

@@ -4,7 +4,7 @@ icon: creative
 ---
 
 ## Introduction
-The DSF uses BPMN 2.0 to model processes. Specifically, the [Operaton](https://docs.operaton.org/) dialect from the [Camunda Modeler](https://camunda.com/de/download/modeler/). Modeling processes for the DSF requires this modeler or any other modeler which is able to produce the correct Operaton dialect.
+The DSF uses BPMN 2.0 to model processes. Specifically, the [Camunda 7](https://docs.camunda.org/manual/7.21/) dialect from the [Camunda Modeler](https://camunda.com/de/download/modeler/). Modeling processes for the DSF requires this modeler or any other modeler which is able to produce the correct Operaton / Camunda 7 dialect.
 
 ## Details
 - [Conditions](conditions.md)