Update RabbitMQ-Overview.json

Global counters for producers added in #3127 but never made it to this dashboard

Author: johanrhodin

deps/rabbitmq_prometheus/docker/grafana/dashboards/RabbitMQ-Overview.json

@@ -306,7 +306,7 @@
       "pluginVersion": "8.3.4",
       "targets": [
         {
-          "expr": "sum(rabbitmq_channels * on(instance) group_left(rabbitmq_cluster) rabbitmq_identity_info{rabbitmq_cluster=\"$rabbitmq_cluster\", namespace=\"$namespace\"}) - sum(rabbitmq_channel_consumers * on(instance) group_left(rabbitmq_cluster) rabbitmq_identity_info{rabbitmq_cluster=\"$rabbitmq_cluster\", namespace=\"$namespace\"})",
+          "expr": "sum(rabbitmq_global_publishers * on(instance) group_left(rabbitmq_cluster) rabbitmq_identity_info{rabbitmq_cluster=\"$rabbitmq_cluster\", namespace=\"$namespace\"})",
           "format": "time_series",
           "instant": false,
           "intervalFactor": 1,
@@ -8205,4 +8205,4 @@
   "uid": "Kn5xm-gZk",
   "version": 20220805,
   "weekStart": ""
-}
+}