Updates deploy webhook example to match docs

[cbron]

What this PR does / why we need it:
Fixes docs for validating webhook. The ValidatingWebhookConfiguration should correctly target the service as shown in the docs. Also fixes typo.

I can create an issue for tracking.

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[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: cbron
To complete the pull request process, please assign bowei
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[aledbf]

@cbron thank you for the PR. We are in the process to migrate the helm chart to this repository. Once the TODO list is ready #5161, we plan to create the static manifest using helm template (to simplify and keep in sync both formats).

[aledbf]

For that reason, I will put this PR on hold.

/hold

[aledbf]

In the meantime, please sign the CLA.

[cbron]

No problem, CLA should be good now.

[aledbf]

Closing. The validation webhook is enabled by default now and there is no need to use templates or execute any command for the SSL certificate creation

[k8s-ci-robot]

@cbron: PR needs rebase.

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