Update sysmon needle for issue with column titles in new GTK

There's a problem with the column titles in the latest GTK, they
are virtually invisible:
https://gitlab.gnome.org/GNOME/gnome-system-monitor/-/issues/310
match on something else to avoid this.

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

needles/gnome/apps/sysmon/sysmon_processes_shown-20240702.json

@@ -0,0 +1,22 @@
+{
+  "area": [
+    {
+      "width": 100,
+      "height": 26,
+      "type": "match",
+      "xpos": 327,
+      "ypos": 42
+    },
+    {
+      "height": 19,
+      "width": 83,
+      "ypos": 180,
+      "xpos": 20,
+      "type": "match"
+    }
+  ],
+  "properties": [],
+  "tags": [
+    "sysmon_processes_shown"
+  ]
+}