chore(deps): update grafana/grafana docker tag to v12.2.0

Author: renovate[bot]

build-images.sh

@@ -13,7 +13,7 @@ controller_version="2.1.0"
 promtail_image="docker.io/grafana/promtail:3.5.6"
 loki_image="docker.io/grafana/loki:2.9.15"
 prometheus_image="docker.io/prom/prometheus:v3.5.0"
-grafana_image="docker.io/grafana/grafana:12.1.1"
+grafana_image="docker.io/grafana/grafana:12.2.0"
 timescale_image="docker.io/timescale/timescaledb:2.22.1-pg16"
 webssh_version=1.6.2