Indicate that Marketplace shouldn't get translated

resources/qml/Actions.qml

@@ -1,4 +1,4 @@
-// Copyright (c) 2021 Ultimaker B.V.
+// Copyright (c) 2022 Ultimaker B.V.
 // Cura is released under the terms of the LGPLv3 or higher.
 
 pragma Singleton
@@ -215,14 +215,14 @@ Item
     Action
     {
         id: marketplaceMaterialsAction
-        text: catalog.i18nc("@action:inmenu", "Add more materials from Marketplace")
+        text: catalog.i18nc("@action:inmenu Marketplace is a brand name of Ultimaker's, so don't translate.", "Add more materials from Marketplace")
     }
 
     Action
     {
         id: updateProfileAction;
         enabled: !Cura.MachineManager.stacksHaveErrors && Cura.MachineManager.hasUserSettings && Cura.MachineManager.activeQualityChangesGroup != null
-        text: catalog.i18nc("@action:inmenu menubar:profile","&Update profile with current settings/overrides");
+        text: catalog.i18nc("@action:inmenu menubar:profile", "&Update profile with current settings/overrides");
         onTriggered: Cura.ContainerManager.updateQualityChanges();
     }
 
@@ -480,7 +480,7 @@ Item
     Action
     {
         id: browsePackagesAction
-        text: catalog.i18nc("@action:menu", "&Marketplace")
+        text: "&Marketplace"
         iconName: "plugins_browse"
     }
 }