chore: fix PR review request workflow, since celestia-bot no longer exists #333
Description
Workflow is broken now https://github.com/celestiaorg/CIPs/actions/runs/16453507591/job/46504573315?pr=332
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Workflow is broken now https://github.com/celestiaorg/CIPs/actions/runs/16453507591/job/46504573315?pr=332