chore(deps): update sigstore/cosign-installer action to v3.1.1

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
sigstore/cosign-installer	action	patch	v3.1.0 -> v3.1.1

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Release Notes

sigstore/cosign-installer (sigstore/cosign-installer)

### [`v3.1.1`](https://togithub.com/sigstore/cosign-installer/releases/tag/v3.1.1) [Compare Source](https://togithub.com/sigstore/cosign-installer/compare/v3.1.0...v3.1.1) #### What's Changed - default cosign to v2.1.1 by [@​cpanato](https://togithub.com/cpanato) in [https://github.com/sigstore/cosign-installer/pull/137](https://togithub.com/sigstore/cosign-installer/pull/137) **Full Changelog**: https://github.com/sigstore/cosign-installer/compare/v3.1.0...v3.1.1

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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.

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