Dependabot: Only group minor and patch updates #5984

Job	Run time
Ruby analysis (macos-latest, nightly-latest)	1m 7s
Ruby analysis (ubuntu-latest, linked)	51s
Ruby analysis (macos-latest, linked)	1m 14s
Ruby analysis (macos-latest, default)	59s
Ruby analysis (ubuntu-latest, nightly-latest)	48s
Ruby analysis (ubuntu-latest, default)	49s
	5m 48s

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