chore(deps): update sigstore/cosign-installer action to v3.0.5

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
sigstore/cosign-installer	action	patch	v3.0.4 -> v3.0.5

---

Release Notes

sigstore/cosign-installer

### [`v3.0.5`](https://togithub.com/sigstore/cosign-installer/releases/tag/v3.0.5) [Compare Source](https://togithub.com/sigstore/cosign-installer/compare/v3.0.4...v3.0.5) #### What's Changed - download cosign releases from GitHub rather than GCS by [@​bobcallaway](https://togithub.com/bobcallaway) in [https://github.com/sigstore/cosign-installer/pull/126](https://togithub.com/sigstore/cosign-installer/pull/126) **Full Changelog**: https://github.com/sigstore/cosign-installer/compare/v3.0.4...v3.0.5

---

Configuration

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

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ 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 has been generated by Mend Renovate. View repository job log here.