use 8443 instead of target port

[kannon92]

What type of PR is this?

/kind bug

What this PR does / why we need it:

If I don't use 8443 as the port, I have trouble with metrics working.

This matches what we have for kustomize.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

NONE

[k8s-ci-robot]

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