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Bump ruby/setup-ruby from 1.284.0 to 1.286.0 in /.github/workflows in the actions-minor group across 1 directory #8839

Job	Run time
Split workflow (macos-latest, linked)	1m 57s
Split workflow (ubuntu-latest, default)	1m 13s
Split workflow (ubuntu-latest, linked)	1m 24s
Split workflow (ubuntu-latest, nightly-latest)	1m 16s
Split workflow (macos-latest, nightly-latest)	1m 44s
Split workflow (macos-latest, default)	2m 3s
	9m 37s