Description of problem:

Missing translation for "unknown" keyword in the tekton translation file(BCP). Here is the location where it should have been: https://github.com/backstage/community-plugins/blob/main/workspaces/tekton/plugins/tekton/src/translations/ref.ts#L69-L74

Prerequisites (if any, like setup, operators/versions):

Steps to Reproduce

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Actual results:

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Reproducibility (Always/Intermittent/Only Once):

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