Improve README.md #55

Job	Run time
build (21, adopt, macos-latest)	6m 7s
build (21, adopt, ubuntu-latest)	4m 39s
build (21, adopt, windows-latest)	5m 8s
build (21, adopt-openj9, macos-latest)	5m 21s
build (21, adopt-openj9, ubuntu-latest)	5m 3s
build (21, adopt-openj9, windows-latest)	5m 54s
build (21, corretto, macos-latest)	5m 59s
build (21, corretto, ubuntu-latest)	3m 44s
build (21, corretto, windows-latest)	5m 4s
build (21, dragonwell, ubuntu-latest)	4m 37s
build (21, dragonwell, windows-latest)	4m 48s
build (21, liberica, macos-latest)	6m 32s
build (21, liberica, ubuntu-latest)	3m 38s
build (21, liberica, windows-latest)	5m 2s
build (21, microsoft, ubuntu-latest)	4m 36s
build (21, microsoft, windows-latest)	5m 6s
build (21, temurin, macos-latest)	5m 40s
build (21, temurin, ubuntu-latest)	3m 40s
build (21, temurin, windows-latest)	5m 13s
build (21, zulu, macos-latest)	5m 51s
build (21, zulu, ubuntu-latest)	3m 44s
build (21, zulu, windows-latest)	5m 11s
	1h 50m 37s

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