Update campaign links in onboarding-add printer flow

contributes to CURA-8689

resources/qml/WelcomePages/AddUltimakerOrThirdPartyPrinter.qml

@@ -69,7 +69,7 @@ Control
             iconSource: UM.Theme.getIcon("LinkExternal")
             isIconOnRightSide: true
             textFont: UM.Theme.getFont("small")
-            onClicked: Qt.openUrlExternally("") // TODO: Update url
+            onClicked: Qt.openUrlExternally("https://support.ultimaker.com/hc/en-us/articles/360012019239?utm_source=cura&utm_medium=software&utm_campaign=onboarding-add-printer")
         }
     }
 }

resources/qml/WelcomePages/AddUltimakerPrinter.qml

@@ -84,7 +84,7 @@ Control
                     iconSource: UM.Theme.getIcon("LinkExternal")
                     isIconOnRightSide: true
                     textFont: UM.Theme.getFont("small")
-                    onClicked: Qt.openUrlExternally("") // TODO: Update url
+                    onClicked: Qt.openUrlExternally("https://support.ultimaker.com/hc/en-us/articles/360012019239?utm_source=cura&utm_medium=software&utm_campaign=onboarding-add-printer")
                 }
             }
         }