[OSDOCS-15125]: Clarifying DNS prereq

[lahinson]

Version(s): 4.17+

Issue: https://issues.redhat.com/browse/OSDOCS-15125

Link to docs preview: https://98458--ocpdocs-pr.netlify.app/openshift-enterprise/latest/hosted_control_planes/hcp-deploy/hcp-deploy-virt.html#hcp-virt-prereqs_hcp-deploy-virt

QE review:

• QE has approved this change.

Additional information:

[ocpdocs-previewbot]

🤖 Wed Sep 03 15:45:27 - Prow CI generated the docs preview:

https://98458--ocpdocs-pr.netlify.app/openshift-enterprise/latest/hosted_control_planes/hcp-deploy/hcp-deploy-virt.html

[openshift-ci]

@lahinson: all tests passed!

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[csrwng]

/lgtm

[jiezhao16]

/lgtm

[mburke5678]

/cherrypick enterprise-4.17

[mburke5678]

/cherrypick enterprise-4.18

[mburke5678]

/cherrypick enterprise-4.19

[mburke5678]

/cherrypick enterprise-4.20

[openshift-cherrypick-robot]

@mburke5678: new pull request created: #98480

In response to this:

/cherrypick enterprise-4.17

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[openshift-cherrypick-robot]

@mburke5678: new pull request created: #98481

In response to this:

/cherrypick enterprise-4.18

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[openshift-cherrypick-robot]

@mburke5678: new pull request created: #98482

In response to this:

/cherrypick enterprise-4.19

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[openshift-cherrypick-robot]

@mburke5678: new pull request created: #98483

In response to this:

/cherrypick enterprise-4.20

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.