Update data-platform-workflows to v13.1.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
canonical/data-platform-workflows	action	minor	v13.0.0 -> v13.1.0
pytest-operator-cache	integration	minor	v13.0.0 -> v13.1.0
pytest-operator-groups	integration	minor	v13.0.0 -> v13.1.0

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Release Notes

canonical/data-platform-workflows (canonical/data-platform-workflows)

### [`v13.1.0`](https://togithub.com/canonical/data-platform-workflows/releases/tag/v13.1.0) [Compare Source](https://togithub.com/canonical/data-platform-workflows/compare/v13.0.0...v13.1.0) ##### What's Changed - compatible(pytest_plugins/microceph): Remove upper limit on pytest dependency by [@​carlcsaposs-canonical](https://togithub.com/carlcsaposs-canonical) in [https://github.com/canonical/data-platform-workflows/pull/159](https://togithub.com/canonical/data-platform-workflows/pull/159) **Full Changelog**: https://github.com/canonical/data-platform-workflows/compare/v13.0.0...v13.1.0

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