fix(clock): vertically align clock content (#3994)

quickshell/Widgets/ClockContent.qml

@@ -84,6 +84,7 @@ Item {
         anchors.centerIn: parent
         columns: root.vertical ? 1 : Math.max(1, layout.visibleChildren.length)
         spacing: root.vertical ? 0 : Theme.spacingS
+        verticalItemAlignment: Grid.AlignVCenter
 
         Loader {
             sourceComponent: root.dateFirst && root.showDate || !root.showTime ? dateComponent : timeComponent