chore(kargo): update image tag kargo to 1.9.6 (#1)

chore(kargo): update image tag kargo to 1.9.6

[View in Kargo UI](https://kargo.nowchess.janis-eccarius.de/project/orchestration-kargo/stage/kargo)

Co-authored-by: Kargo <no-reply@kargo.io>
Reviewed-on: #1
Co-authored-by: svc.kargo <kargo@blackhole.local>
Co-committed-by: svc.kargo <kargo@blackhole.local>

eu-central-1/argo-apps/kargo/kargo.yaml

@@ -11,7 +11,7 @@ spec:
   sources:
     - repoURL: ghcr.io/akuity/kargo-charts
       chart: kargo
-      targetRevision: 1.8.6
+      targetRevision: 1.9.6
       helm:
         valueFiles:
           - $values/kargo/eu-central-1/values.yaml