Bump github.com/sigstore/sigstore from 1.8.2 to 1.8.3 (#482)

Bumps [github.com/sigstore/sigstore](https://github.com/sigstore/sigstore) from 1.8.2 to 1.8.3.
- [Release notes](https://github.com/sigstore/sigstore/releases)
- [Commits](sigstore/sigstore@v1.8.2...v1.8.3)

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

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

go.mod

@@ -21,7 +21,7 @@ require (
 	github.com/sigstore/fulcio v1.4.4
 	github.com/sigstore/protobuf-specs v0.3.0
 	github.com/sigstore/rekor v1.3.5
-	github.com/sigstore/sigstore v1.8.2
+	github.com/sigstore/sigstore v1.8.3
 	github.com/spf13/cobra v1.8.0
 	github.com/spf13/pflag v1.0.5
 	golang.org/x/crypto v0.21.0

go.sum

@@ -560,8 +560,8 @@ github.com/sigstore/protobuf-specs v0.3.0 h1:E49qS++llp4psM+3NNVEb+C4AD422bT9VkO
 github.com/sigstore/protobuf-specs v0.3.0/go.mod h1:ynKzXpqr3dUj2Xk9O/5ZUhjnpi0F53DNi5AdH6pS3jc=
 github.com/sigstore/rekor v1.3.5 h1:QoVXcS7NppKY+rpbEFVHr4evGDZBBSh65X0g8PXoUkQ=
 github.com/sigstore/rekor v1.3.5/go.mod h1:CWqOk/fmnPwORQmm7SyDgB54GTJizqobbZ7yOP1lvw8=
-github.com/sigstore/sigstore v1.8.2 h1:0Ttjcn3V0fVQXlYq7+oHaaHkGFIt3ywm7SF4JTU/l8c=
-github.com/sigstore/sigstore v1.8.2/go.mod h1:CHVcSyknCcjI4K2ZhS1SI28r0tcQyBlwtALG536x1DY=
+github.com/sigstore/sigstore v1.8.3 h1:G7LVXqL+ekgYtYdksBks9B38dPoIsbscjQJX/MGWkA4=
+github.com/sigstore/sigstore v1.8.3/go.mod h1:mqbTEariiGA94cn6G3xnDiV6BD8eSLdL/eA7bvJ0fVs=
 github.com/sigstore/sigstore/pkg/signature/kms/aws v1.8.1 h1:rEDdUefulkIQaMJyzLwtgPDLNXBIltBABiFYfb0YmgQ=
 github.com/sigstore/sigstore/pkg/signature/kms/aws v1.8.1/go.mod h1:RCdYCc1IxCYWzh2IdzdA6Yf7JIY0cMRqH08fpQYechw=
 github.com/sigstore/sigstore/pkg/signature/kms/azure v1.8.1 h1:DvRWG99QGWZC5mp42SEde2Xke/Q384Idnj2da7yB+Mk=