fix: correctly configure webhook for KIC servicemonitor

[thameezb]

What this PR does / why we need it:

Correctly adds in ports to the KIC webhook service so that the servicemonitor can correctly match

Checklist

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• [x] PR is based off the current tip of the main branch.
• [x] Changes are documented under the "Unreleased" header in CHANGELOG.md
• [ ] New or modified sections of values.yaml are documented in the README.md
• [x] Commits follow the Kong commit message guidelines

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