Fix "read more" not being translated

Yeah, i know, this breaks the stringfreeze. But this wasn't translated in the
first place. So the actual effect here is zero (but at least it will be translated
in the next round!)

CURA-9146

plugins/Marketplace/resources/qml/OnboardBanner.qml

@@ -19,7 +19,6 @@ Rectangle
     implicitHeight: childrenRect.height + 2 * UM.Theme.getSize("default_margin").height
     color: UM.Theme.getColor("action_panel_secondary")
 
-    // Icon
     UM.ColorImage
     {
         id: onboardingIcon
@@ -33,7 +32,6 @@ Rectangle
         height: UM.Theme.getSize("banner_icon_size").height
     }
 
-    // Close button
     UM.SimpleButton
     {
         id: onboardingClose
@@ -52,8 +50,8 @@ Rectangle
         onClicked: onRemove()
     }
 
-    // Body
-    Label {
+    UM.Label
+    {
         id: infoText
         anchors
         {
@@ -63,11 +61,8 @@ Rectangle
             margins: UM.Theme.getSize("default_margin").width
         }
 
-        font: UM.Theme.getFont("default")
-
         renderType: Text.NativeRendering
         color: UM.Theme.getColor("primary_text")
-        wrapMode: Text.Wrap
         elide: Text.ElideRight
 
         onLineLaidOut: (line) =>
@@ -102,7 +97,7 @@ Rectangle
         id: readMoreButton
         anchors.left: infoText.left
         anchors.bottom: infoText.bottom
-        text: "Learn More"
+        text: catalog.i18nc("@button:label", "Learn More")
         textFont: UM.Theme.getFont("default")
         textColor: infoText.color
         leftPadding: 0