Update glo-grafana-globalhub-1-4 to 21cbd95

[red-hat-konflux]

Image created from 'https://github.com/stolostron/glo-grafana?rev=6026aa0c59440a1523a62edf268dd33252fb162c'

This PR contains the following updates:

Package	Update	Change
quay.io/redhat-user-workloads/acm-multicluster-glo-tenant/glo-grafana-globalhub-1-4	digest	d4b73f8 -> 21cbd95

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[openshift-ci]

Hi @red-hat-konflux[bot]. Thanks for your PR.

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[clyang82]

/ok-to-test
/lgtm
/approve

[openshift-ci]

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