software/peertube: fixup typo

See merge request !1299
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Status Job ID Name Coverage
  External
passed Cloudooo.UnitTest-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.KVM.ResilienceTest-Master

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failed SlapOS.SoftwareReleases.IntegrationTest-Master

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passed SlapOS.Theia.ResilienceTest-Master

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passed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster

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