Update grafana/grafana Docker tag to v12 (#2182)

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

Author: renovate[bot]

deployment-examples/metrics/docker-compose.yaml

@@ -47,7 +47,7 @@ services:
 
   # Grafana for visualization
   grafana:
-    image: grafana/grafana:10.3.0
+    image: grafana/grafana:12.4.0
     container_name: grafana
     restart: unless-stopped
     ports: