chore: release 0.5.1

[github-actions[bot]]

:robot: I have created a release beep boop

0.5.1 (2023-12-01)

🐛 Bug Fixes

• use webhook ns if empty, more test versions (#568) (b9b619d)

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[github-actions[bot]]

:robot: Release is at https://github.com/open-feature/open-feature-operator/releases/tag/v0.5.1 :sunflower: