[Post-Release] Add Breaking Changes for 0.20.0 to GitHub Release Notes

[anna-geller]

Info for the community: Kestra 0.20.0 will be released on December 3rd, following our usual release cycle on the first Tuesday of every second month.

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Breaking Changes

Labels starting with system. are now reserved for internal usage so you can no longer use this prefix for your own labels.

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EE: fallback on unhealthy workers

By default, a task configured to run on a worker group where no workers are available will wait forever for the worker to be available. The previous behavior was to fail.

This is configurable, the previous behavior can be implemented with:

  - id: hello
    type: io.kestra.plugin.core.log.Log
    message: Hello World! 🚀
    workerGroup:
      key: wg1
      fallback: FAIL #  possible values are WAIT (default), FAIL or CANCEL

EE Users

mention that users need to run CLI command to copy email as username https://github.com/kestra-io/kestra-ee/issues/1587