chore(deps): update helm release kiali-server to v2.12.0 (#618)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

kubernetes-services/templates/istio.yaml

@@ -42,7 +42,7 @@ spec:
       targetRevision: 1.26.2
     - repoURL: https://kiali.org/helm-charts
       chart: kiali-server
-      targetRevision: 2.11.0
+      targetRevision: 2.12.0
       helm:
         values: |
           clustering: