[grafana] Update Grafana to 12.2.0

Signed-off-by: Sven Schliesing <muffl0n@raffts.net>

Author: muffl0n

charts/grafana/Chart.yaml

@@ -1,7 +1,7 @@
 apiVersion: v2
 name: grafana
-version: 10.0.0
-appVersion: 12.1.1
+version: 10.1.0
+appVersion: 12.2.0
 kubeVersion: "^1.8.0-0"
 description: The leading tool for querying and visualizing time series and metrics.
 home: https://grafana.com