Fix default value for Ephemeral in documentation

[rm3l]

What type of PR is this:
/kind documentation

What does this PR do / why we need it:
Since #5795, the default value for 'Ephemeral' is now False, but the documentation was outdated.

Which issue(s) this PR fixes:
No issue related

PR acceptance criteria:

• Unit test

• Integration test

• Documentation

How to test changes / Special notes to the reviewer:

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[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

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[odo-robot]

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[valaparthvi]

/approve
/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: valaparthvi

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[feloy]

/override windows-integration-test/Windows-test

Doc only

[openshift-ci]

@feloy: Overrode contexts on behalf of feloy: windows-integration-test/Windows-test

In response to this:

/override windows-integration-test/Windows-test

Doc only

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