fix links

Author: rpietzsch

docs/build/reference/customtask/cmem_plugin_kafka-ReceiveMessages.md

@@ -26,7 +26,7 @@ flat schema:
 
 - **key** - the optional key of the message,
 - **content** - the message itself as plain text (use other operators, such as
-  [Parse JSON](https://documentation.eccenca.com/latest/deploy-and-configure/configuration/dataintegration/plugin-reference/#parse-json) or [Parse XML](https://documentation.eccenca.com/latest/deploy-and-configure/configuration/dataintegration/plugin-reference/#parse-xml) to process
+  [Parse JSON](JsonParserOperator.md) or [Parse XML](XmlParserOperator.md) to process
   complex message content),
 - **offset** - the given offset of the message in the topic,
 - **ts-production** - the timestamp when the message was written to the topic,

docs/explore-and-author/graph-exploration/building-a-customized-user-interface/workflow-trigger/index.md

@@ -34,7 +34,7 @@ A `shui:WidgetIntegration` resource needs to be created from the previously defi
 
 ![](create_new_widget_integration.png)
 
-Once the widget is created, it can be attached to a Node Shape by using a special-purpose non-validating [Widget property](../node-shapes#widgets).
+Once the widget is created, it can be attached to a Node Shape by using a special-purpose non-validating [Widget property](../node-shapes/index.md#widgets).
 
 ![](adding_widget_to_node.png)
 
@@ -55,4 +55,4 @@ Workflow Payload
 - `graphIRI` is the IRI of the graph that is currently viewed, and
 - `resourceIRI` is the IRI of the resource that is viewed.
 
-To make use of this dynamic payload, the underlying workflow should define variable input using [Replaceable Datasets](../../../../build/workflows#replaceable-datasets).
+To make use of this dynamic payload, the underlying workflow should define variable input using [Replaceable Datasets](../../../../build/workflows/index.md#replaceable-datasets).