sync/shared-config: avoid syncing multiple Gemfile*, .ruby-version. #169

Job	Run time
sync (Homebrew/.github)	27s
sync (Homebrew/actions)	21s
sync (Homebrew/brew)	13s
sync (Homebrew/brew-pip-audit)	15s
sync (Homebrew/brew.sh)	20s
sync (Homebrew/ci-orchestrator)	27s
sync (Homebrew/discussions)	22s
sync (Homebrew/formula-patches)	25s
sync (Homebrew/formulae.brew.sh)	42s
sync (Homebrew/glibc-bootstrap)	23s
sync (Homebrew/homebrew-aliases)	17s
sync (Homebrew/homebrew-bundle)	28s
sync (Homebrew/homebrew-cask)	26s
sync (Homebrew/homebrew-command-not-found)	24s
sync (Homebrew/homebrew-core)	21s
sync (Homebrew/homebrew-formula-analytics)	19s
sync (Homebrew/homebrew-linux-fonts)	30s
sync (Homebrew/homebrew-portable-ruby)	28s
sync (Homebrew/homebrew-services)	25s
sync (Homebrew/homebrew-test-bot)	26s
sync (Homebrew/install)	20s
sync (Homebrew/orka_api_client)	23s
sync (Homebrew/ruby-macho)	47s
sync (Homebrew/rubydoc.brew.sh)	24s
sync (Homebrew/mass-bottling-tracker-private)	18s
sync (Homebrew/governance-private)	24s
sync (Homebrew/security-private)	22s
sync (Homebrew/ops-private)	22s
conclusion	1s
	11m 20s

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