update example for latest api version

[tlliddle]

This PR is to add support for the new spec in the Ingress Resource for Kubernetes version 1.19+.

Details on this PR can be found in #2067 and #2066

[k8s-ci-robot]

Hi @tlliddle. Thanks for your PR.

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[kishorj]

Thanks for the contribution.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kishorj, tlliddle

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[codecov-commenter]

Codecov Report

Merging #2072 (be472df) into main (8c7ce02) will not change coverage.
The diff coverage is n/a.

@@ Coverage Diff @@ ## main #2072 +/- ## ======================================= Coverage 49.23% 49.23% ======================================= Files 130 130 Lines 7036 7036 ======================================= Hits 3464 3464 Misses 3294 3294 Partials 278 278 

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