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

Bumps [github.com/sigstore/sigstore/pkg/signature/kms/hashivault](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/hashivault
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

go.mod

@@ -55,7 +55,7 @@ require (
 	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 v1.8.4
-	github.com/sigstore/sigstore/pkg/signature/kms/hashivault v1.8.3
+	github.com/sigstore/sigstore/pkg/signature/kms/hashivault v1.8.4
 	go.opentelemetry.io/otel v1.27.0
 	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.27.0
 	go.opentelemetry.io/otel/sdk v1.27.0
@@ -113,13 +113,13 @@ require (
 	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
+	github.com/hashicorp/go-retryablehttp v0.7.6 // indirect
 	github.com/hashicorp/go-rootcerts v1.0.2 // indirect
 	github.com/hashicorp/go-secure-stdlib/parseutil v0.1.7 // indirect
 	github.com/hashicorp/go-secure-stdlib/strutil v0.1.2 // indirect
 	github.com/hashicorp/go-sockaddr v1.0.2 // indirect
 	github.com/hashicorp/hcl v1.0.0 // indirect
-	github.com/hashicorp/vault/api v1.12.2 // indirect
+	github.com/hashicorp/vault/api v1.14.0 // indirect
 	github.com/jellydator/ttlcache/v3 v3.2.0 // indirect
 	github.com/kylelemons/godebug v1.1.0 // indirect
 	github.com/letsencrypt/boulder v0.0.0-20230907030200-6d76a0f91e1e // indirect