deploy/kubernetes: Update snapshot-validation-webhook

Since 4f783f1 added validation for `volumesnapshotclasses`, the
`snapshot-validation-webhook` needs to handle this kind of resource. But
version 5.0.1 doesn't, which leads to failures when updating or creating
`volumesnapshotclasses`.

This commit updates the `snapshot-validation-webhook` version to 6.0.1 in
`deploy/kubernetes/webhook-example/admission-configuration-template`.

Signed-off-by: Benoît Knecht <[email protected]>

Author: BenoitKnecht

deploy/kubernetes/webhook-example/webhook.yaml

@@ -18,7 +18,7 @@ spec:
       serviceAccountName: snapshot-webhook
       containers:
       - name: snapshot-validation
-        image: k8s.gcr.io/sig-storage/snapshot-validation-webhook:v5.0.1 # change the image if you wish to use your own custom validation server image
+        image: k8s.gcr.io/sig-storage/snapshot-validation-webhook:v6.0.1 # change the image if you wish to use your own custom validation server image
         imagePullPolicy: IfNotPresent
         args: ['--tls-cert-file=/etc/snapshot-validation-webhook/certs/cert.pem', '--tls-private-key-file=/etc/snapshot-validation-webhook/certs/key.pem']
         ports: