fix(grafana.json): Change title from 'Mesh' to 'Hive Gateway' (#1555)

Author: ardatan

packages/plugins/prometheus/grafana.json

@@ -1444,7 +1444,7 @@
   },
   "timepicker": {},
   "timezone": "browser",
-  "title": "Mesh",
+  "title": "Hive Gateway",
   "uid": "edtn0ujblc3y8b",
   "version": 12,
   "weekStart": ""