Merge pull request #164 from fluent/dependabot.yml #296

Job	Run time
ruby-versions / Generate Ruby versions	4s
Ruby 4.0 unit testing on ubuntu-latest	5m 59s
Ruby 3.4 unit testing on ubuntu-latest	6m 0s
Ruby 3.3 unit testing on ubuntu-latest	5m 59s
Ruby 3.2 unit testing on ubuntu-latest	5m 59s
Ruby 3.1 unit testing on ubuntu-latest	5m 48s
	29m 49s

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