[release-4.5] [release-4.6] install-approvers: add staebler

[openshift-cherrypick-robot]

This is an automated cherry-pick of #4298

/assign sdodson

[openshift-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[sdodson]

I'll green button this over the weekend when it won't invalidate items in the 4.5 merge queue.

[openshift-merge-robot]

@openshift-cherrypick-robot: The following tests failed, say /retest to rerun all failed tests:

Test name	Commit	Details	Rerun command
ci/prow/e2e-aws-scaleup-rhel7	36c3bbb	link	/test e2e-aws-scaleup-rhel7
ci/prow/e2e-aws	36c3bbb	link	/test e2e-aws
ci/prow/e2e-openstack	36c3bbb	link	/test e2e-openstack
ci/prow/images	36c3bbb	link	/test images
ci/prow/e2e-aws-upgrade	36c3bbb	link	/test e2e-aws-upgrade
ci/prow/e2e-ovirt	36c3bbb	link	/test e2e-ovirt

Full PR test history. Your PR dashboard.

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[sdodson]

/cherry-pick release-4.4

[openshift-cherrypick-robot]

@sdodson: new pull request created: #4302

In response to this:

/cherry-pick release-4.4

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