Merge pull request #3075 from jupyterhub/update-chart-grafana

Updates grafana chart to 8.4.8

Author: manics

mybinder/Chart.yaml

@@ -33,7 +33,7 @@ dependencies:
   # Source code:   https://github.com/grafana/helm-charts/tree/main/charts/grafana
   # App changelog: https://github.com/grafana/grafana/blob/main/CHANGELOG.md
   - name: grafana
-    version: "8.4.7"
+    version: "8.4.8"
     repository: https://grafana.github.io/helm-charts
     condition: grafana.enabled