fix: upgrade Cosign to v2

[suzuki-shunsuke]

• Upgrade Cosign to v2.0 aqua#1665

[suzuki-shunsuke]

https://github.com/aquaproj/aqua-registry/actions/runs/8382491417/job/22956365186?pr=21122

ERRO[0026] install the package                           aqua_version=2.25.1-5 asset_name=nfpm_2.11.0_Linux_x86_64.tar.gz cosign_opts="--certificate-identity-regexp, https://github\\.com/goreleaser/nfpm/\\.github/workflows/release\\.yml@.*, --certificate-oidc-issuer, https://token.actions.githubusercontent.com,/ --signature, https://github.com/goreleaser/nfpm/releases/download/v2.11.0/checksums.txt.sig, --certificate, https://github.com/goreleaser/nfpm/releases/download/v2.11.0/checksums.txt.pem" env=linux/amd64 error="verify a checksum file with Cosign: verify a signature file with Cosign: verify with Cosign" package_name=goreleaser/nfpm package_version=v2.11.0 program=aqua registry=standard target=/tmp/601494830

https://github.com/goreleaser/nfpm
https://github.com/goreleaser/nfpm/releases/tag/v2.11.0

Error: none of the expected identities matched what was in the certificate, got subjects [carlos@becker.software] with issuer https://github.com/login/oauth
main.go:74: error during command execution: none of the expected identities matched what was in the certificate, got subjects [carlos@becker.software] with issuer https://github.com/login/oauth