Test

README: add description for automation #25

Job	Run time
Build gem	10s
Test with Ruby 3.4 on macos-latest	15s
Test with Ruby 3.4 on ubuntu-latest	8s
Test with Ruby 3.2 on macos-latest	11s
Test with Ruby 3.3 on windows-latest	1m 10s
Test with Ruby 3.3 on ubuntu-latest	9s
Test with Ruby 3.3 on macos-latest	11s
Test with Ruby 3.2 on ubuntu-latest	10s
Test with Ruby 3.2 on windows-latest	2m 5s
Test with Ruby 2.7.1 on ubuntu-latest	20s
Test with Ruby 3.4 on windows-latest	2m 23s
Test with Ruby 2.7.1 on windows-latest	1m 24s
Test with Ruby 2.4.2 on windows-latest	2m 7s
Test with Ruby 2.4.2 on ubuntu-latest	20s
td-agent-v3.1.1.el7-test.bash	6m 28s
td-agent-v3.1.1.xenial-test.bash	7m 54s
td-agent-v4.0.0.el8-test.bash	4m 5s
td-agent-v4.0.0.msi-test.ps1	2m 9s
td-agent-v3.1.1.msi-test.ps1	1m 52s
td-agent-v4.0.0.focal-test.bash	2m 59s
fluent-package-v5.0.1.el9-test.bash	3m 8s
fluent-package-v5.0.1.jammy-test.bash	3m 28s
Gem with Ruby 3.4 on ubuntu-latest	28s
fluent-package-v5.0.1.msi-test.ps1	1m 46s
Gem with Ruby 3.3 on windows-latest	2m 49s
Gem with Ruby 3.3 on ubuntu-latest	24s
Gem with Ruby 3.4 on windows-latest	3m 32s
Gem with Ruby 2.7.1 on windows-latest	4m 10s
Gem with Ruby 3.2 on windows-latest	2m 37s
Gem with Ruby 2.7.1 on ubuntu-latest	1m 12s
Gem with Ruby 3.2 on ubuntu-latest	23s
	1h 0m 27s

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