CI: warden-cpi - fixup template-renderer script #1546

Job	Run time
unit_specs (release)	52s
unit_specs (common:parallel)	50s
unit_specs-director (postgresql)	3m 24s
unit_specs-director (mysql)	6m 11s
unit_specs (monitor:parallel)	52s
unit_specs (nats_sync:parallel)	54s
	13m 3s

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