chore(deps): update kubernetes-csi/external-snapshotter to v8.6.0

apps/templates/authentik-helm.yaml

@@ -16,7 +16,7 @@ spec:
   sources:
     - chart: authentik
       repoURL: https://charts.goauthentik.io
-      targetRevision: 2026.2.3
+      targetRevision: 2026.2.1
       helm:
         values: |
           authentik:

apps/templates/snapshot-controller-helm.yaml

@@ -7,7 +7,7 @@ spec:
   project: default
   source:
     repoURL: https://github.com/kubernetes-csi/external-snapshotter.git
-    targetRevision: v8.2.1
+    targetRevision: v8.6.0
     path: deploy/kubernetes/snapshot-controller
   destination:
     server: https://kubernetes.default.svc