services/nomad/monitoring: Update grafana to 8.3.3

Author: the-maldridge

services/nomad/monitoring/grafana.nomad

@@ -50,7 +50,7 @@ job "grafana" {
       }
 
       config {
-        image = "grafana/grafana:7.4.3"
+        image = "grafana/grafana:8.3.3"
         ports = ["http"]
       }