chore(deps): update module github.com/sigstore/rekor to v1.4.0

Author: renovate-rancher[bot]

go.mod

@@ -7,7 +7,7 @@ toolchain go1.24.5
 require (
 	github.com/google/go-containerregistry v0.20.6
 	github.com/sigstore/cosign/v2 v2.5.2
-	github.com/sigstore/rekor v1.3.10
+	github.com/sigstore/rekor v1.4.0
 	github.com/sigstore/sigstore v1.9.5
 	github.com/sirupsen/logrus v1.9.3
 	github.com/theupdateframework/go-tuf v0.7.0
@@ -54,7 +54,7 @@ require (
 	github.com/google/go-querystring v1.1.0 // indirect
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/hashicorp/go-cleanhttp v0.5.2 // indirect
-	github.com/hashicorp/go-retryablehttp v0.7.7 // indirect
+	github.com/hashicorp/go-retryablehttp v0.7.8 // indirect
 	github.com/in-toto/attestation v1.1.1 // indirect
 	github.com/in-toto/in-toto-golang v0.9.0 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
@@ -81,14 +81,14 @@ require (
 	github.com/sassoftware/relic v7.2.1+incompatible // indirect
 	github.com/secure-systems-lab/go-securesystemslib v0.9.0 // indirect
 	github.com/shibumi/go-pathspec v1.3.0 // indirect
-	github.com/sigstore/protobuf-specs v0.4.3 // indirect
+	github.com/sigstore/protobuf-specs v0.5.0 // indirect
 	github.com/sigstore/sigstore-go v1.0.0 // indirect
 	github.com/sigstore/timestamp-authority v1.2.8 // indirect
 	github.com/sourcegraph/conc v0.3.0 // indirect
 	github.com/spf13/afero v1.12.0 // indirect
 	github.com/spf13/cast v1.7.1 // indirect
 	github.com/spf13/cobra v1.9.1 // indirect
-	github.com/spf13/pflag v1.0.6 // indirect
+	github.com/spf13/pflag v1.0.7 // indirect
 	github.com/spf13/viper v1.20.1 // indirect
 	github.com/subosito/gotenv v1.6.0 // indirect
 	github.com/syndtr/goleveldb v1.0.1-0.20220721030215-126854af5e6d // indirect
@@ -106,15 +106,15 @@ require (
 	go.opentelemetry.io/otel/trace v1.36.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
 	go.uber.org/zap v1.27.0 // indirect
-	golang.org/x/crypto v0.39.0 // indirect
+	golang.org/x/crypto v0.40.0 // indirect
 	golang.org/x/exp v0.0.0-20250408133849-7e4ce0ab07d0 // indirect
-	golang.org/x/mod v0.25.0 // indirect
-	golang.org/x/net v0.41.0 // indirect
+	golang.org/x/mod v0.26.0 // indirect
+	golang.org/x/net v0.42.0 // indirect
 	golang.org/x/oauth2 v0.30.0 // indirect
-	golang.org/x/sync v0.15.0 // indirect
-	golang.org/x/sys v0.33.0 // indirect
-	golang.org/x/term v0.32.0 // indirect
-	golang.org/x/text v0.26.0 // indirect
+	golang.org/x/sync v0.16.0 // indirect
+	golang.org/x/sys v0.34.0 // indirect
+	golang.org/x/term v0.33.0 // indirect
+	golang.org/x/text v0.27.0 // indirect
 	golang.org/x/time v0.12.0 // indirect
 	google.golang.org/genproto/googleapis/api v0.0.0-20250519155744-55703ea1f237 // indirect
 	google.golang.org/protobuf v1.36.6 // indirect