Upgrade `octokit` to v4.1.2 #4445

Job	Run time
Ruby analysis (macos-latest, linked)	59s
Ruby analysis (ubuntu-latest, nightly-latest)	41s
Ruby analysis (ubuntu-latest, default)	46s
Ruby analysis (ubuntu-latest, linked)	44s
Ruby analysis (macos-latest, default)	1m 7s
Ruby analysis (macos-latest, nightly-latest)	1m 16s
	5m 33s

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