Narrow the light blue Next button match

Don't match on the arrow, another app has it on the other side.
The color and text should be enough to avoid false matches.

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

needles/kde/apps/kde_next-lightblue-20210929.json

@@ -1,15 +1,15 @@
-{
-  "area": [
-    {
-      "width": 55,
-      "type": "match",
-      "ypos": 242,
-      "height": 18,
-      "xpos": 203
-    }
-  ],
-  "properties": [],
-  "tags": [
-    "kde_next"
-  ]
-}
+{
+    "area": [
+        {
+            "height": 18,
+            "type": "match",
+            "width": 30,
+            "xpos": 223,
+            "ypos": 242
+        }
+    ],
+    "properties": [],
+    "tags": [
+        "kde_next"
+    ]
+}