software/ors-amarisoft: update README and changelog

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failed ERP5.StandaloneDeploymentScriptTest-Debian.Buster.Master

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passed SlapOS-Master.StandaloneDeploymentScriptTest-Debian.Buster

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passed SlapOS.Eggs.UnitTest-Master.Python2

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passed SlapOS.Eggs.UnitTest-Master.Python3

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passed SlapOS.Theia.ResilienceTest-Master-ERP5

passed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster