Update OWNERS

[pruan-rht]

added pruan-rht as part of onboarding.

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: pruan-rht
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[openshift-ci]

@pruan-rht: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/security	abf7264	link	false	/test security

Full PR test history. Your PR dashboard.

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