[example] update apiVersion of Deployment

[oke-py]

Relates to in case of new feature, this should point to issue/(s) which describes the feature

Fixes #3160. in case of a bug fix, this should point to a bug and any other related issue(s)

Should merge before : list any PRs that depend on this PR

Should merge after : list any PRs that are prerequisites to this PR

Description

User facing changes

n/a

Next PRs.

n/a

Submitter Checklist

These are the criteria that every PR should meet, please check them off as you
review them:

• Includes unit tests
• Mentions any output changes.
• Adds documentation as needed: user docs, YAML reference, CLI reference.
• Adds integration tests if needed.

Reviewer Notes

• The code flow looks good.
• Unit test added.
• User facing changes look good.

Release Notes

Update examples apiVersion of Deployment, Ingress

[codecov]

Codecov Report

Merging #3161 into master will not change coverage.
The diff coverage is n/a.

[dgageot]

Please rebase your PR and them it's all good!

[oke-py]

I rebased and force-pushed

[dgageot]

@oke-py you rock!

[oke-py]

Travis CI failed because of master branch. I rebased again to take in the patch for master.
Need kokoro:run?