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	v3.0.3 -> v3.0.5

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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 ### [`v3.0.4`](https://togithub.com/sigstore/cosign-installer/releases/tag/v3.0.4) [Compare Source](https://togithub.com/sigstore/cosign-installer/compare/v3.0.3...v3.0.4) - Include fix for [https://github.com/sigstore/cosign-installer/pull/124](https://togithub.com/sigstore/cosign-installer/pull/124)

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Configuration

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