Bump github.com/sigstore/sigstore/pkg/signature/kms/gcp

Bumps [github.com/sigstore/sigstore/pkg/signature/kms/gcp](https://github.com/sigstore/sigstore) from 1.8.3 to 1.8.4.
- [Release notes](https://github.com/sigstore/sigstore/releases)
- [Commits](sigstore/sigstore@v1.8.3...v1.8.4)

---
updated-dependencies:
- dependency-name: github.com/sigstore/sigstore/pkg/signature/kms/gcp
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

go.mod

@@ -54,7 +54,7 @@ require (
 	github.com/google/go-containerregistry/pkg/authn/kubernetes v0.0.0-20240108195214-a0658aa1d0cc
 	github.com/sigstore/sigstore/pkg/signature/kms/aws v1.8.4
 	github.com/sigstore/sigstore/pkg/signature/kms/azure v1.8.3
-	github.com/sigstore/sigstore/pkg/signature/kms/gcp v1.8.3
+	github.com/sigstore/sigstore/pkg/signature/kms/gcp v1.8.4
 	github.com/sigstore/sigstore/pkg/signature/kms/hashivault v1.8.3
 	go.opentelemetry.io/otel v1.27.0
 	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.27.0
@@ -76,9 +76,13 @@ require (
 )
 
 require (
+	cloud.google.com/go v0.113.0 // indirect
+	cloud.google.com/go/auth v0.4.1 // indirect
+	cloud.google.com/go/auth/oauth2adapt v0.2.2 // indirect
 	cloud.google.com/go/compute/metadata v0.3.0 // indirect
-	cloud.google.com/go/iam v1.1.7 // indirect
-	cloud.google.com/go/kms v1.15.8 // indirect
+	cloud.google.com/go/iam v1.1.8 // indirect
+	cloud.google.com/go/kms v1.17.1 // indirect
+	cloud.google.com/go/longrunning v0.5.7 // indirect
 	dario.cat/mergo v1.0.0 // indirect
 	github.com/Azure/azure-sdk-for-go/sdk/azcore v1.10.0 // indirect
 	github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.5.1 // indirect
@@ -106,7 +110,7 @@ require (
 	github.com/google/gnostic-models v0.6.8 // indirect
 	github.com/google/s2a-go v0.1.7 // indirect
 	github.com/googleapis/enterprise-certificate-proxy v0.3.2 // indirect
-	github.com/googleapis/gax-go/v2 v2.12.3 // indirect
+	github.com/googleapis/gax-go/v2 v2.12.4 // indirect
 	github.com/grpc-ecosystem/grpc-gateway/v2 v2.20.0 // indirect
 	github.com/hashicorp/go-cleanhttp v0.5.2 // indirect
 	github.com/hashicorp/go-retryablehttp v0.7.2 // indirect
@@ -239,8 +243,8 @@ require (
 	golang.org/x/text v0.15.0 // indirect
 	golang.org/x/time v0.5.0 // indirect
 	golang.org/x/tools v0.20.0 // indirect
-	google.golang.org/api v0.172.0 // indirect
-	google.golang.org/genproto v0.0.0-20240227224415-6ceb2ff114de // indirect
+	google.golang.org/api v0.181.0 // indirect
+	google.golang.org/genproto v0.0.0-20240401170217-c3f982113cda // indirect
 	google.golang.org/grpc v1.64.0
 	google.golang.org/protobuf v1.34.1
 	gopkg.in/inf.v0 v0.9.1 // indirect