chore(deps): update dependency sigstore/cosign to v2.4.0

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
sigstore/cosign	minor	v2.3.0 -> v2.4.0

---

Release Notes

sigstore/cosign (sigstore/cosign)

### [`v2.4.0`](https://togithub.com/sigstore/cosign/compare/v2.3.0...v2.4.0) [Compare Source](https://togithub.com/sigstore/cosign/compare/v2.3.0...v2.4.0)

---

Configuration

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

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

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

---

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

---

This PR was generated by Mend Renovate. View the repository job log.