Bump grafana to 7.5.6

00f0e82e · Romain De Laage De Bellefaye · 3b470a58 · 00f0e82e
Verified Commit 00f0e82e authored May 14, 2021 by Romain De Laage De Bellefaye 🌳
--- a/pica-metrologie/docker-compose.yml
+++ b/pica-metrologie/docker-compose.yml
@@ -16,7 +16,7 @@ volumes:

 services:
  grafana:
-    image: grafana/grafana:7.5.4
+    image: grafana/grafana:7.5.6
    container_name: grafana
    volumes:
      - grafana:/var/lib/grafana