stack/slapos: Version up slapos.core 1.10.3

4 jobs for 1.0
Status Job ID Name Coverage
  External
passed Cloudooo.UnitTest-Master

passed ERP5.StandaloneDeploymentScriptTest-Debian.Buster

passed SlapOS-Master.StandaloneDeploymentScriptTest-Debian.Buster

passed SlapOS.Theia.ResilienceTest-Master-ERP5