Add another Cockpit logs entry needle for 'kernel'

Kernel is logging a lot of errors ATM, so it can flood this
screen and we don't see any of our other candidates.

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

needles/cockpit/logs_entry-kernel-20250710.json

@@ -0,0 +1,15 @@
+{
+  "area": [
+    {
+      "type": "match",
+      "xpos": 918,
+      "width": 46,
+      "ypos": 606,
+      "height": 15
+    }
+  ],
+  "properties": [],
+  "tags": [
+    "cockpit_logs_entry"
+  ]
+}