Update data-platform-workflows to v16.2.1

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
canonical/data-platform-workflows	action	minor	v16.0.1 -> v16.2.1
pytest-github-secrets	integration	minor	v16.0.1 -> v16.2.1
pytest-operator-cache	integration	minor	v16.0.1 -> v16.2.1
pytest-operator-groups	integration	minor	v16.0.1 -> v16.2.1

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Release Notes

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

### [`v16.2.1`](https://togithub.com/canonical/data-platform-workflows/releases/tag/v16.2.1) [Compare Source](https://togithub.com/canonical/data-platform-workflows/compare/v16.2.0...v16.2.1) ##### What's Changed - patch(\_sync_docs.yaml): Update source of gatekeeper action by [@​a-velasco](https://togithub.com/a-velasco) in [https://github.com/canonical/data-platform-workflows/pull/201](https://togithub.com/canonical/data-platform-workflows/pull/201) **Full Changelog**: https://github.com/canonical/data-platform-workflows/compare/v16.2.0...v16.2.1 ### [`v16.2.0`](https://togithub.com/canonical/data-platform-workflows/releases/tag/v16.2.0) [Compare Source](https://togithub.com/canonical/data-platform-workflows/compare/v16.1.0...v16.2.0) ##### What's Changed - compatible(build_charm.yaml): Add GitHub auth to avoid ccc rate limit by [@​carlcsaposs-canonical](https://togithub.com/carlcsaposs-canonical) in [https://github.com/canonical/data-platform-workflows/pull/202](https://togithub.com/canonical/data-platform-workflows/pull/202) **Full Changelog**: https://github.com/canonical/data-platform-workflows/compare/v16.1.0...v16.2.0 ##### Migration instructions If you have a build wrapper in tox.ini, add `GH_TOKEN` to `pass_env` ```ini [testenv:build-{production,dev,wrapper}] ##### Wrap `charmcraft pack` pass_env = CI GH_TOKEN ``` Example: [https://github.com/canonical/pgbouncer-k8s-operator/pull/322](https://togithub.com/canonical/pgbouncer-k8s-operator/pull/322) ### [`v16.1.0`](https://togithub.com/canonical/data-platform-workflows/releases/tag/v16.1.0) [Compare Source](https://togithub.com/canonical/data-platform-workflows/compare/v16.0.1...v16.1.0) ##### What's Changed - compatible(integration_test_charm.yaml): Grant full SSH access on Azure runners by [@​carlcsaposs-canonical](https://togithub.com/carlcsaposs-canonical) in [https://github.com/canonical/data-platform-workflows/pull/200](https://togithub.com/canonical/data-platform-workflows/pull/200) **Full Changelog**: https://github.com/canonical/data-platform-workflows/compare/v16.0.1...v16.1.0

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