Add CAPO into contract list

[jichenjc]

What this PR does / why we need it:
add openstack into provider contact list
Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

[jichenjc]

/test pull-cluster-api-verify-external-links

[jichenjc]

/test pull-cluster-api-test

[jichenjc]

/test pull-cluster-api-verify-external-links

[fabriziopandini]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: fabriziopandini

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[randomvariable]

looks like linkchecker hit API limits. we might need to feed it a github token in the authorisation header @vincepri ?

/test pull-cluster-api-verify-external-links

[k8s-ci-robot]

@jichenjc: The following test failed, say /retest to rerun all failed tests:

Test name	Commit	Details	Rerun command
pull-cluster-api-verify-external-links	57e3c05	link	/test pull-cluster-api-verify-external-links

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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[randomvariable]

/lgtm