Clarify the existing pending job is canceled

data/reusables/actions/actions-group-concurrency.md

@@ -1,4 +1,4 @@
-When a concurrent job or workflow is queued, if another job or workflow using the same concurrency group in the repository is in progress, the queued job or workflow will be `pending`. Any pending job or workflow in the concurrency group will be canceled. This means that there can be at most one running and one pending job in a concurrency group at any time.
+When a concurrent job or workflow is queued, if another job or workflow using the same concurrency group in the repository is in progress, the queued job or workflow will be `pending`. Any existing pending job or workflow in the concurrency group will be canceled. This means that there can be at most one running and one pending job in a concurrency group at any time.
 
 To also cancel any currently running job or workflow in the same concurrency group, specify `cancel-in-progress: true`. To conditionally cancel currently running jobs or workflows in the same concurrency group, you can specify `cancel-in-progress` as an expression with any of the allowed expression contexts.