update grafana chart version

Signed-off-by: Jean-Philippe Quémémer <jeanphilippe.quemener@grafana.com>

charts/grafana/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v2
 name: grafana
-version: 6.17.9
+version: 6.17.10
 appVersion: 8.2.5
 kubeVersion: "^1.8.0-0"
 description: The leading tool for querying and visualizing time series and metrics.