Update Helm release kiali-server to v2.8.0

Author: renovate[bot]

charts/nopo11y-stack/Chart.yaml

@@ -28,7 +28,7 @@ dependencies:
 - condition: kiali-server.enabled
   name: kiali-server
   repository: https://kiali.org/helm-charts
-  version: 2.1.0
+  version: 2.8.0
 - condition: prom2teams.enabled
   name: prom2teams
   repository: ""