Add a variant KDE desktop notification needle

The Notifications box can be drawn in slightly different positions,
it seems, and this affects the needle match because it includes
bits of the background.

Signed-off-by: Adam Williamson <awilliam@redhat.com>

needles/kde/desktop_update_notification_only-kde-20260408.json

@@ -0,0 +1,30 @@
+{
+  "area": [
+    {
+      "height": 14,
+      "type": "match",
+      "width": 132,
+      "ypos": 373,
+      "xpos": 570
+    },
+    {
+      "ypos": 372,
+      "xpos": 949,
+      "type": "match",
+      "height": 173,
+      "width": 39
+    },
+    {
+      "xpos": 601,
+      "ypos": 195,
+      "width": 110,
+      "height": 100,
+      "type": "match"
+    }
+  ],
+  "properties": [],
+  "tags": [
+    "DESKTOP-kde",
+    "desktop_update_notification_only"
+  ]
+}