Update pascalgn/automerge-action action to v0.15.6

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
pascalgn/automerge-action	action	patch	v0.15.5 -> v0.15.6

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Release Notes

pascalgn/automerge-action

### [`v0.15.6`](https://togithub.com/pascalgn/automerge-action/releases/tag/v0.15.6): Release 0.15.6 [Compare Source](https://togithub.com/pascalgn/automerge-action/compare/v0.15.5...v0.15.6) - Add `MERGE_READY_STATE` option ([#​208](https://togithub.com/pascalgn/automerge-action/issues/208)) - Update dependencies

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Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• [ ] If you want to rebase/retry this PR, check this box

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