Update grafana/grafana Docker tag to v11.3.0 (#483)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

docker-compose.metrics.yaml

@@ -21,7 +21,7 @@ services:
       - ./prometheus:/etc/prometheus/
 
   grafana:
-    image: grafana/grafana:11.2.2
+    image: grafana/grafana:11.3.0
     networks:
       - test
     ports: