Update grafana/grafana Docker tag to v12.2.1 (#836)

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

Author: renovate[bot]

docker-compose.metrics.yaml

@@ -19,7 +19,7 @@ services:
       - ./prometheus:/etc/prometheus/
 
   grafana:
-    image: grafana/grafana:12.2.0
+    image: grafana/grafana:12.2.1
     networks:
       - test
     ports: