docs: use v1 format in install-config examples

[markmc]

Since #1589 users should be using v1.

[openshift-ci-robot]

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[markmc]

/assign wking

[openshift-ci-robot]

@markmc: The following test failed, say /retest to rerun them all:

Test name	Commit	Details	Rerun command
ci/prow/e2e-aws-disruptive	278689c	link	/test e2e-aws-disruptive

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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[jstuever]

/close
Handled in #2321

[openshift-ci-robot]

@jstuever: Closed this PR.

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In response to this:

/close
Handled in #2321

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[wking]

Whoops, sorry I missed this one :/