Bump github.com/sigstore/sigstore from 1.6.3 to 1.6.4 (#304)

Bumps [github.com/sigstore/sigstore](https://github.com/sigstore/sigstore) from 1.6.3 to 1.6.4.
- [Release notes](https://github.com/sigstore/sigstore/releases)
- [Commits](sigstore/sigstore@v1.6.3...v1.6.4)

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

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

go.mod

@@ -20,7 +20,7 @@ require (
 	github.com/sigstore/cosign/v2 v2.0.2
 	github.com/sigstore/fulcio v1.2.0
 	github.com/sigstore/rekor v1.1.1
-	github.com/sigstore/sigstore v1.6.3
+	github.com/sigstore/sigstore v1.6.4
 	github.com/spf13/cobra v1.7.0
 	github.com/spf13/pflag v1.0.5
 	golang.org/x/crypto v0.8.0
@@ -35,7 +35,7 @@ require (
 	github.com/AliyunContainerService/ack-ram-tool/pkg/credentials/alibabacloudsdkgo/helper v0.2.0 // indirect
 	github.com/Azure/azure-sdk-for-go v68.0.0+incompatible // indirect
 	github.com/Azure/go-autorest v14.2.0+incompatible // indirect
-	github.com/Azure/go-autorest/autorest v0.11.28 // indirect
+	github.com/Azure/go-autorest/autorest v0.11.29 // indirect
 	github.com/Azure/go-autorest/autorest/adal v0.9.22 // indirect
 	github.com/Azure/go-autorest/autorest/azure/auth v0.5.12 // indirect
 	github.com/Azure/go-autorest/autorest/azure/cli v0.4.6 // indirect
@@ -58,19 +58,19 @@ require (
 	github.com/alibabacloud-go/tea-xml v1.1.2 // indirect
 	github.com/aliyun/credentials-go v1.2.4 // indirect
 	github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2 // indirect
-	github.com/aws/aws-sdk-go-v2 v1.17.8 // indirect
-	github.com/aws/aws-sdk-go-v2/config v1.18.21 // indirect
-	github.com/aws/aws-sdk-go-v2/credentials v1.13.20 // indirect
-	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.13.2 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/configsources v1.1.32 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.4.26 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/ini v1.3.33 // indirect
+	github.com/aws/aws-sdk-go-v2 v1.18.0 // indirect
+	github.com/aws/aws-sdk-go-v2/config v1.18.23 // indirect
+	github.com/aws/aws-sdk-go-v2/credentials v1.13.22 // indirect
+	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.13.3 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/configsources v1.1.33 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.4.27 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/ini v1.3.34 // indirect
 	github.com/aws/aws-sdk-go-v2/service/ecr v1.18.1 // indirect
 	github.com/aws/aws-sdk-go-v2/service/ecrpublic v1.15.0 // indirect
-	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.9.26 // indirect
-	github.com/aws/aws-sdk-go-v2/service/sso v1.12.8 // indirect
-	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.14.8 // indirect
-	github.com/aws/aws-sdk-go-v2/service/sts v1.18.9 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.9.27 // indirect
+	github.com/aws/aws-sdk-go-v2/service/sso v1.12.10 // indirect
+	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.14.10 // indirect
+	github.com/aws/aws-sdk-go-v2/service/sts v1.18.11 // indirect
 	github.com/aws/smithy-go v1.13.5 // indirect
 	github.com/awslabs/amazon-ecr-credential-helper/ecr-login v0.0.0-20230110223219-40efa3093a22 // indirect
 	github.com/benbjohnson/clock v1.3.0 // indirect
@@ -122,7 +122,7 @@ require (
 	github.com/google/go-github/v50 v50.2.0 // indirect
 	github.com/google/go-querystring v1.1.0 // indirect
 	github.com/google/gofuzz v1.2.0 // indirect
-	github.com/google/s2a-go v0.1.2 // indirect
+	github.com/google/s2a-go v0.1.3 // indirect
 	github.com/google/trillian v1.5.1 // indirect
 	github.com/google/uuid v1.3.0 // indirect
 	github.com/googleapis/enterprise-certificate-proxy v0.2.3 // indirect
@@ -196,11 +196,11 @@ require (
 	golang.org/x/net v0.9.0 // indirect
 	golang.org/x/sync v0.1.0 // indirect
 	golang.org/x/sys v0.8.0 // indirect
-	golang.org/x/term v0.7.0 // indirect
+	golang.org/x/term v0.8.0 // indirect
 	golang.org/x/text v0.9.0 // indirect
 	golang.org/x/time v0.3.0 // indirect
 	golang.org/x/tools v0.7.0 // indirect
-	google.golang.org/api v0.119.0 // indirect
+	google.golang.org/api v0.121.0 // indirect
 	google.golang.org/appengine v1.6.7 // indirect
 	google.golang.org/genproto v0.0.0-20230410155749-daa745c078e1 // indirect
 	google.golang.org/grpc v1.54.0 // indirect