Add yet another variant 'updates available' needle

GNOME seems to be growing a bunch of different variants of this
alert. Annoying.

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

needles/gnome/desktop_update_notification_only-criticalupdates-gnome-20240324.json

@@ -0,0 +1,17 @@
+{
+  "area": [
+    {
+      "width": 89,
+      "xpos": 171,
+      "ypos": 58,
+      "height": 202,
+      "type": "match"
+    }
+  ],
+  "properties": [],
+  "tags": [
+    "desktop_update_notification_only",
+    "desktop_update_notification",
+    "DESKTOP-gnome"
+  ]
+}