Drop match level on cockpit main needle

New cockpit hits 95%, let's just drop the required %age rather
than make a new needle.

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

needles/cockpit/cockpit_main-cockpit209-20191214.json

@@ -5,11 +5,12 @@
             "type": "match",
             "width": 73,
             "xpos": 378,
-            "ypos": 731
+            "ypos": 731,
+            "match": 93
         }
     ],
     "properties": [],
     "tags": [
         "cockpit_main"
     ]
-}
+}