Update grafana/grafana Docker tag to v12

Author: renovate[bot]

docker-compose.yml

@@ -63,7 +63,7 @@ services:
     restart: always
 
   grafana:
-    image: grafana/grafana:10.1.0@sha256:047c1c5aa6fef257b6c2516f95c8fcd9f28707c201c6413dd78328b6cbedff6f
+    image: grafana/grafana:12.0.2@sha256:b5b59bfc7561634c2d7b136c4543d702ebcc94a3da477f21ff26f89ffd4214fa
     volumes:
       - grafana:/var/lib/grafana
       - ./config/grafana/dashboards/:/etc/grafana/dashboards/