Fix the cp command in the release publish task
Fix the cp command in the release publish task

Before Tekton Pipelines v0.24.x, $HOME and workDir were implicitly set,
which rendered the cp command redundant and hid the issue.

Partially fixes tektoncd/plumbing#856

Signed-off-by: Andrea Frittoli <4cec69a2e3f23b658ef5550bf7c5b5012f9473f7@gmail.com>

tektoncd/triggers,tektoncd/triggers