Bump github.com/sigstore/sigstore from 1.8.2 to 1.8.3

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]>

go.mod

@@ -26,7 +26,7 @@ require (
 	github.com/prometheus/client_model v0.6.0
 	github.com/prometheus/common v0.51.1
 	github.com/rs/cors v1.10.1
-	github.com/sigstore/sigstore v1.8.2
+	github.com/sigstore/sigstore v1.8.3
 	github.com/sigstore/sigstore/pkg/signature/kms/aws v1.8.2
 	github.com/sigstore/sigstore/pkg/signature/kms/azure v1.8.2
 	github.com/sigstore/sigstore/pkg/signature/kms/gcp v1.8.2

go.sum

@@ -308,8 +308,8 @@ github.com/secure-systems-lab/go-securesystemslib v0.8.0 h1:mr5An6X45Kb2nddcFlbm
 github.com/secure-systems-lab/go-securesystemslib v0.8.0/go.mod h1:UH2VZVuJfCYR8WgMlCU1uFsOUU+KeyrTWcSS73NBOzU=
 github.com/segmentio/ksuid v1.0.4 h1:sBo2BdShXjmcugAMwjugoGUdUV0pcxY5mW4xKRn3v4c=
 github.com/segmentio/ksuid v1.0.4/go.mod h1:/XUiZBD3kVx5SmUOl55voK5yeAbBNNIed+2O73XgrPE=
-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 v1.8.2 h1:e0EtUcE7cqWBxxME7h6upA3EA0IR3EOE3F1t+WHOdTc=
 github.com/sigstore/sigstore/pkg/signature/kms/aws v1.8.2/go.mod h1:07qBxPjI9bsgdQRiBz27Ai+gl6hgr//vwXMZzTX87Us=
 github.com/sigstore/sigstore/pkg/signature/kms/azure v1.8.2 h1:Fgt4dC9OozkLEtMO6JYfFgqNdSDG1y1uAdiJgrtZYN4=