feat(docs): Update broken link to grafana dashboard (dragonflydb#314)

Signed-off-by: Oded Poncz <[email protected]>

README.md

@@ -204,7 +204,8 @@ Right now it does not have much info but in the future we are planning to add th
 debugging and management info. If you go to `:6379/metrics` url you will see some prometheus
 compatible metrics.
 
-The Prometheus exported metrics are compatible with the Grafana dashboard [see here](examples/grafana/dashboard.json).
+The Prometheus exported metrics are compatible with the Grafana dashboard [see here](tools/local/monitoring/grafana/provisioning/dashboards/dashboard.json).
+
 
 Important! Http console is meant to be accessed within a safe network.
 If you expose Dragonfly's TCP port externally, it is advised to disable the console