Bump grafana to "7.5.8"

Signed-off-by: Jeremy MAURO <jeremy.mauro@gmail.com>

docker-compose.yaml

@@ -3,7 +3,7 @@ version: "3.7"
 
 services:
   grafana:
-    image: docker.local/grafana:7.5.5
+    image: docker.local/grafana:7.5.8
     volumes:
       - "grafana-storage:/var/lib/grafana"
       - "./grafana/provisioning/datasources:/etc/grafana/provisioning/datasources"