Bump github.com/sigstore/sigstore from 1.6.5 to 1.7.1 (#1011)

Bumps [github.com/sigstore/sigstore](https://github.com/sigstore/sigstore) from 1.6.5 to 1.7.1.
- [Release notes](https://github.com/sigstore/sigstore/releases)
- [Commits](sigstore/sigstore@v1.6.5...v1.7.1)

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

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

go.mod

@@ -181,7 +181,7 @@ require (
 	github.com/pkg/errors v0.9.1
 	github.com/prometheus/client_golang v1.15.1
 	github.com/regclient/regclient v0.4.8
-	github.com/sigstore/sigstore v1.6.5
+	github.com/sigstore/sigstore v1.7.1
 	github.com/spdx/tools-golang v0.5.2
 	github.com/spf13/viper v1.16.0
 	github.com/vektah/gqlparser/v2 v2.5.4

go.sum

@@ -2194,8 +2194,8 @@ github.com/shurcooL/graphql v0.0.0-20200928012149-18c5c3165e3a/go.mod h1:AuYgA5K
 github.com/shurcooL/httpfs v0.0.0-20190707220628-8d4bc4ba7749/go.mod h1:ZY1cvUeJuFPAdZ/B6v7RHavJWZn2YPVFQ1OSXhCGOkg=
 github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=
 github.com/shurcooL/vfsgen v0.0.0-20200824052919-0d455de96546/go.mod h1:TrYk7fJVaAttu97ZZKrO9UbRa8izdowaMIZcxYMbVaw=
-github.com/sigstore/sigstore v1.6.5 h1:/liHIo7YPJp6sN31DzBYDOuRPmN1xbzROMBE5DLllYM=
-github.com/sigstore/sigstore v1.6.5/go.mod h1:h+EoQsf9+6UKgNYxKhBcPgo4PZeEVfzAJxKRRIYhyN4=
+github.com/sigstore/sigstore v1.7.1 h1:fCATemikcBK0cG4+NcM940MfoIgmioY1vC6E66hXxks=
+github.com/sigstore/sigstore v1.7.1/go.mod h1:0PmMzfJP2Y9+lugD0wer4e7TihR5tM7NcIs3bQNk5xg=
 github.com/sirupsen/logrus v1.0.4-0.20170822132746-89742aefa4b2/go.mod h1:pMByvHTf9Beacp5x1UXfOR9xyW/9antXMhjMPG0dEzc=
 github.com/sirupsen/logrus v1.0.6/go.mod h1:pMByvHTf9Beacp5x1UXfOR9xyW/9antXMhjMPG0dEzc=
 github.com/sirupsen/logrus v1.2.0/go.mod h1:LxeOpSwHxABJmUn/MG1IvRgCAasNZTLOkJPxbbu5VWo=