Description of problem:

On Pull Request if user add comment /test to /retest to particular pipelinerun
Like
/test go-testing
 
OR
/retest go-testing
 
is no more executing that particular pipelinerun

Issue: https://github.com/openshift-pipelines/pipelines-as-code/issues/1433

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

Steps to Reproduce

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