chore(deps): update pepr to v0.28.7 #1275

Job	Run time
lint-check	46s
Select Jobs	4s
Schedule (all, registry1, install) / Test	14m 19s
Schedule (all, registry1, upgrade) / Test	30m 21s
Schedule (all, upstream, upgrade) / Test	15m 50s
Schedule (all, upstream, install) / Test	13m 45s
	1h 15m 5s

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