TEP-0058: Graceful Termination - `PipelineRunCancelled` is deprecated
TEP-0058: Graceful Termination - `PipelineRunCancelled` is deprecated

In [TEP-0058: Graceful Termination][tep-0058], we deprecated `PipelineRunCancelled`
and added:
- `StoppedRunFinally` - To "stop" (i.e. let the tasks complete, then execute finally
tasks) a Pipeline
- `CancelledRunFinally` - To "cancel" (i.e. interrupt any executing non finally tasks,
then execute finally tasks)
- `Cancelled` - Same as today's `PipelineRunCancelled` - i.e. interrupt any executing
 tasks without running finally tasks

The above was released in [v0.25][v25] in June 2021.

This change adds the deprecated field - `PipelineRunCancelled` - to the deprecation table.

Issue: https://github.com/tektoncd/pipeline/issues/4611

[tep-0058]: https://github.com/tektoncd/community/blob/main/teps/0058-graceful-pipeline-run-termination.md
[v25]: https://github.com/tektoncd/pipeline/releases/tag/v0.25.0

tektoncd/pipeline,tektoncd/pipeline