fix(deps): update github.com/sigstore/protobuf-specs digest to 5ef5406

Signed-off-by: Renovate Bot <[email protected]>

go.mod

@@ -148,7 +148,7 @@ require (
 	github.com/segmentio/ksuid v1.0.4 // indirect
 	github.com/shibumi/go-pathspec v1.3.0 // indirect
 	github.com/sigstore/fulcio v1.2.0
-	github.com/sigstore/protobuf-specs v0.1.1-0.20230503063121-91485b44360d
+	github.com/sigstore/protobuf-specs v0.1.1-0.20230518173429-5ef54068bb53
 	github.com/sirupsen/logrus v1.9.0 // indirect
 	github.com/skratchdot/open-golang v0.0.0-20200116055534-eef842397966 // indirect
 	github.com/spf13/afero v1.9.3 // indirect

go.sum

@@ -691,8 +691,8 @@ github.com/sigstore/cosign/v2 v2.0.2 h1:Ttaj/OkJAy+ummhnHG2F+JSFeZQj8i0P6o8j2RY9
 github.com/sigstore/cosign/v2 v2.0.2/go.mod h1:yJXtRmWrumyQA/XPjTTjOufnNckI87mmmVxv9rtEqgE=
 github.com/sigstore/fulcio v1.2.0 h1:I4H764cDbryKXkPtasUvo8bcix/7xLvkxWYWNp+JtWI=
 github.com/sigstore/fulcio v1.2.0/go.mod h1:FS7qpBvOEqs0uEh1+hJxzxtJistWN29ybLtAzFNUi0c=
-github.com/sigstore/protobuf-specs v0.1.1-0.20230503063121-91485b44360d h1:Zcb01JMzGaofV3qXkNPXl2HySnx0ZwImT3YzQf9W4Uw=
-github.com/sigstore/protobuf-specs v0.1.1-0.20230503063121-91485b44360d/go.mod h1:5shUCxf82hGnjUEFVWiktcxwzdtn6EfeeJssxZ5Q5HE=
+github.com/sigstore/protobuf-specs v0.1.1-0.20230518173429-5ef54068bb53 h1:q2rO7GOmez7Im4t1JGKCe9BaepE97yMT6NE5zpB3LaA=
+github.com/sigstore/protobuf-specs v0.1.1-0.20230518173429-5ef54068bb53/go.mod h1:5shUCxf82hGnjUEFVWiktcxwzdtn6EfeeJssxZ5Q5HE=
 github.com/sigstore/rekor v1.2.0 h1:ahlnoEY3zo8Vc+eZLPobamw6YfBTAbI0lthzUQd6qe4=
 github.com/sigstore/rekor v1.2.0/go.mod h1:zcFO54qIg2G1/i0sE/nvmELUOng/n0MPjTszRYByVPo=
 github.com/sigstore/sigstore v1.6.4 h1:jH4AzR7qlEH/EWzm+opSpxCfuUcjHL+LJPuQE7h40WE=