include bootstrapExternalStatic* variables in doc

[manurodriguez]

Description

Starting in OCP 4.12 there are some variables that allow to statically assign IP/GW in the external net and DNS in 4.14. Also update bootstrapProvisioningIP references for 4.6.

Type of change

Please select the appropriate options:

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update
• This change is a documentation update

Testing

This is a change in the documentation.
The use of these variables is being tested in redhatci/ansible-collection-redhatci-ocp#426

Checklist

• I have performed a self-review of my own code
• If a change is adding a feature, it should require a change to the README.md and the review should catch this.
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• A change should not be merged unless it passes CI or there is a comment/update saying what testing was passed.
• PRs should not be merged unless positively reviewed.

[openshift-ci]

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[openshift-ci]

Hi @manurodriguez. Thanks for your PR.

I'm waiting for a openshift-kni member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[github-actions]

This PR is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 7 days

[manurodriguez]

cc: @derekhiggins