Update data-platform-workflows to v13.1.2

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
canonical/data-platform-workflows	action	patch	v13.1.1 -> v13.1.2
pytest-github-secrets	integration	patch	v13.1.1 -> v13.1.2
pytest-operator-cache	integration	patch	v13.1.1 -> v13.1.2
pytest-operator-groups	integration	patch	v13.1.1 -> v13.1.2

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Release Notes

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

### [`v13.1.2`](https://togithub.com/canonical/data-platform-workflows/releases/tag/v13.1.2) [Compare Source](https://togithub.com/canonical/data-platform-workflows/compare/v13.1.1...v13.1.2) ##### What's Changed - patch(integration_test_charm.yaml): Update secret docs to avoid redacting `{` and `}` from logs by [@​carlcsaposs-canonical](https://togithub.com/carlcsaposs-canonical) in [https://github.com/canonical/data-platform-workflows/pull/166](https://togithub.com/canonical/data-platform-workflows/pull/166) **Full Changelog**: https://github.com/canonical/data-platform-workflows/compare/v13.1.1...v13.1.2

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