Drop match threshold on KDE log out entry needle

OK, reducing the match area didn't help. So let's drop the
threshold instead.

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

needles/kde/log_out_entry.json

@@ -3,6 +3,7 @@
         {
             "height": 15,
             "type": "match",
+            "match": 90,
             "width": 52,
             "xpos": 77,
             "ypos": 283
@@ -12,4 +13,4 @@
     "tags": [
         "log_out_entry"
     ]
-}
+}