chore: bump github.com/in-toto/go-witness from 0.8.0 to 0.8.1 (#510)

Bumps [github.com/in-toto/go-witness](https://github.com/in-toto/go-witness) from 0.8.0 to 0.8.1.
- [Release notes](https://github.com/in-toto/go-witness/releases)
- [Changelog](https://github.com/in-toto/go-witness/blob/main/.goreleaser.yaml)
- [Commits](in-toto/go-witness@v0.8.0...v0.8.1)

---
updated-dependencies:
- dependency-name: github.com/in-toto/go-witness
  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>

Author: dependabot[bot]

go.mod

@@ -17,7 +17,7 @@ require (
 	github.com/gorilla/handlers v1.5.2
 	github.com/gorilla/mux v1.8.1
 	github.com/hashicorp/go-multierror v1.1.1
-	github.com/in-toto/go-witness v0.8.0
+	github.com/in-toto/go-witness v0.8.1
 	github.com/kelseyhightower/envconfig v1.4.0
 	github.com/lib/pq v1.10.9
 	github.com/minio/minio-go/v7 v7.0.87

go.sum

@@ -214,8 +214,8 @@ github.com/hashicorp/golang-lru/v2 v2.0.7 h1:a+bsQ5rvGLjzHuww6tVxozPZFVghXaHOwFs
 github.com/hashicorp/golang-lru/v2 v2.0.7/go.mod h1:QeFd9opnmA6QUJc5vARoKUSoFhyfM2/ZepoAG6RGpeM=
 github.com/hashicorp/hcl/v2 v2.20.1 h1:M6hgdyz7HYt1UN9e61j+qKJBqR3orTWbI1HKBJEdxtc=
 github.com/hashicorp/hcl/v2 v2.20.1/go.mod h1:TZDqQ4kNKCbh1iJp99FdPiUaVDDUPivbqxZulxDYqL4=
-github.com/in-toto/go-witness v0.8.0 h1:PfcTmbeDZCxzfD57Zr5JosTiANW6qj4oa0X+uWVqcBs=
-github.com/in-toto/go-witness v0.8.0/go.mod h1:phVBT/6D1kO0ItizMI7uomhgifBrcZBzu+UNqZKeGkA=
+github.com/in-toto/go-witness v0.8.1 h1:wGTNVZ3lD3ilm8WvYe2YG4Hm5CLXz6joA6CmqMdPdMM=
+github.com/in-toto/go-witness v0.8.1/go.mod h1:fBsmfWMmFC0LiIhFHsHdlc9mAWhe3rD0SjH2XxbA6TM=
 github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
 github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
 github.com/invopop/jsonschema v0.12.0 h1:6ovsNSuvn9wEQVOyc72aycBMVQFKz7cPdMJn10CvzRI=