Change example data to contain HTML instead of JSON format

Then it's easier for us to show a more readable information about the data we collect

Contributes to CURA-6434.

plugins/SliceInfoPlugin/MoreInfoWindow.qml

@@ -89,6 +89,7 @@ Window
                 }
 
                 textArea.text: manager.getExampleData()
+                textArea.textFormat: Text.RichText
                 textArea.readOnly: true
             }
         }