QML: use function instead of block for event with params

Use arrow functions instead of block statements for event handlers that
are not in a Connections element and use event parameters, because the
implicit parameter passing is deprecated in Qt 6. onLinkActivated is the
only event we have like this.

Author: slipher

NewsCard.qml

@@ -201,9 +201,7 @@ Flickable {
                     font.pixelSize: 21
                     lineHeight: 24
 
-                    onLinkActivated: {
-                        Qt.openUrlExternally(link);
-                    }
+                    onLinkActivated: (link) => Qt.openUrlExternally(link);
 
                     MouseArea {
                         anchors.fill: parent

UpdateFailed.qml

@@ -47,9 +47,7 @@ Popup {
         wrapMode: Text.WordWrap
         font.pixelSize: 21
         lineHeight: 24
-        onLinkActivated: {
-            Qt.openUrlExternally(link);
-        }
+        onLinkActivated: (link) => Qt.openUrlExternally(link);
         MouseArea {
             anchors.fill: parent
             acceptedButtons: Qt.NoButton