bugfix: webhooks in configmap keys

[A-5ingh]

Related issue

Closes #1309.

Proposed Changes

Updated the webhooks to

[{"namespaceSelector":{"matchExpressions":[{"key":"kubernetes.io/metadata.name","operator":"NotIn","values":["kube-system"]},{"key":"kubernetes.io/metadata.name","operator":"NotIn","values":["kyverno"]}],"matchLabels":null}}]

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