chore(deps): Bump github.com/sigstore/protobuf-specs from 0.3.3 to 0.4.0 (#1775)

Bumps [github.com/sigstore/protobuf-specs](https://github.com/sigstore/protobuf-specs) from 0.3.3 to 0.4.0.
- [Release notes](https://github.com/sigstore/protobuf-specs/releases)
- [Changelog](https://github.com/sigstore/protobuf-specs/blob/main/CHANGELOG.md)
- [Commits](sigstore/protobuf-specs@v0.3.3...v0.4.0)

---
updated-dependencies:
- dependency-name: github.com/sigstore/protobuf-specs
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

go.mod

@@ -62,7 +62,7 @@ require (
 	github.com/docker/docker-credential-helpers v0.8.2
 	github.com/docker/go-connections v0.5.0
 	github.com/go-jose/go-jose/v4 v4.0.4
-	github.com/sigstore/protobuf-specs v0.3.3
+	github.com/sigstore/protobuf-specs v0.4.0
 	github.com/sigstore/scaffolding v0.7.18
 	github.com/sigstore/sigstore/pkg/signature/kms/aws v1.8.12
 	github.com/sigstore/sigstore/pkg/signature/kms/azure v1.8.12

go.sum

@@ -751,8 +751,8 @@ github.com/sigstore/cosign/v2 v2.4.1 h1:b8UXEfJFks3hmTwyxrRNrn6racpmccUycBHxDMkE
 github.com/sigstore/cosign/v2 v2.4.1/go.mod h1:GvzjBeUKigI+XYnsoVQDmMAsMMc6engxztRSuxE+x9I=
 github.com/sigstore/fulcio v1.6.5 h1:A9DtV2hmeJ835mtqqxgvV0Sie0HOPKaLPgvFVF4FU7c=
 github.com/sigstore/fulcio v1.6.5/go.mod h1:wUei0BMnlz5iY10keKAx5FXFGnMX0N25ZSe4jGRA65M=
-github.com/sigstore/protobuf-specs v0.3.3 h1:RMZQgXTD/pF7KW6b5NaRLYxFYZ/wzx44PQFXN2PEo5g=
-github.com/sigstore/protobuf-specs v0.3.3/go.mod h1:vIhZ6Uor1a38+wvRrKcqL2PtYNlgoIW9lhzYzkyy4EU=
+github.com/sigstore/protobuf-specs v0.4.0 h1:yoZbdh0kZYKOSiVbYyA8J3f2wLh5aUk2SQB7LgAfIdU=
+github.com/sigstore/protobuf-specs v0.4.0/go.mod h1:FKW5NYhnnFQ/Vb9RKtQk91iYd0MKJ9AxyqInEwU6+OI=
 github.com/sigstore/rekor v1.3.7 h1:Z5UW5TmqbTZnyOFkMRfi32q/CWcxK6VuzIkx+33mbq8=
 github.com/sigstore/rekor v1.3.7/go.mod h1:TihqJscZ6L6398x68EHY82t0AOnGYfrQ0siXe3WgbR4=
 github.com/sigstore/scaffolding v0.7.18 h1:0Uko31b+BHSfoh2v0k61V3H7KwAvOA2gffda3mKfTGk=