Add a KDE variant of the webui_wrong_font needle

I found a few of these looking through past KDE live install test
failures, looks like when we hit the 'wrong font' bug on KDE,
it's rendered slightly differently.

This does imply the bug has nothing to do with Firefox...hmm.

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

needles/anaconda/webui/webui_wrong_font-kde-20260313.json

@@ -0,0 +1,16 @@
+{
+  "area": [
+    {
+      "width": 64,
+      "type": "match",
+      "height": 21,
+      "xpos": 273,
+      "ypos": 141
+    }
+  ],
+  "properties": [],
+  "tags": [
+    "_ANACONDA_WEBUI",
+    "anaconda_webui_wrong_font"
+  ]
+}