Bump github.com/secure-systems-lab/go-securesystemslib (#1524)

Bumps [github.com/secure-systems-lab/go-securesystemslib](https://github.com/secure-systems-lab/go-securesystemslib) from 0.3.0 to 0.3.1.
- [Release notes](https://github.com/secure-systems-lab/go-securesystemslib/releases)
- [Commits](secure-systems-lab/go-securesystemslib@v0.3.0...v0.3.1)

---
updated-dependencies:
- dependency-name: github.com/secure-systems-lab/go-securesystemslib
  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

@@ -23,7 +23,7 @@ require (
 	github.com/miekg/pkcs11 v1.1.1
 	github.com/open-policy-agent/opa v0.35.0
 	github.com/pkg/errors v0.9.1
-	github.com/secure-systems-lab/go-securesystemslib v0.3.0
+	github.com/secure-systems-lab/go-securesystemslib v0.3.1
 	github.com/sigstore/fulcio v0.1.2-0.20220114150912-86a2036f9bc7
 	github.com/sigstore/rekor v0.4.1-0.20220114213500-23f583409af3
 	github.com/sigstore/sigstore v1.1.1-0.20220217212907-e48ca03a5ba7

go.sum

@@ -1865,8 +1865,9 @@ github.com/sclevine/spec v1.4.0/go.mod h1:LvpgJaFyvQzRvc1kaDs0bulYwzC70PbiYjC4Qn
 github.com/sean-/seed v0.0.0-20170313163322-e2103e2c3529/go.mod h1:DxrIzT+xaE7yg65j358z/aeFdxmN0P9QXhEzd20vsDc=
 github.com/seccomp/libseccomp-golang v0.9.1/go.mod h1:GbW5+tmTXfcxTToHLXlScSlAvWlF4P2Ca7zGrPiEpWo=
 github.com/secure-systems-lab/go-securesystemslib v0.2.0/go.mod h1:eIjBmIP8LD2MLBL/DkQWayLiz006Q4p+hCu79rvWleY=
-github.com/secure-systems-lab/go-securesystemslib v0.3.0 h1:PH0mUKuUSXVEVDbrKMgGPcrqrnKA8gJii614+EKKi7g=
 github.com/secure-systems-lab/go-securesystemslib v0.3.0/go.mod h1:o8hhjkbNl2gOamKUA/eNW3xUrntHT9L4W89W1nfj43U=
+github.com/secure-systems-lab/go-securesystemslib v0.3.1 h1:LJuyMziazadwmQRRu1M7GMUo5S1oH1+YxU9FjuSFU8k=
+github.com/secure-systems-lab/go-securesystemslib v0.3.1/go.mod h1:o8hhjkbNl2gOamKUA/eNW3xUrntHT9L4W89W1nfj43U=
 github.com/securego/gosec/v2 v2.9.1/go.mod h1:oDcDLcatOJxkCGaCaq8lua1jTnYf6Sou4wdiJ1n4iHc=
 github.com/segmentio/ksuid v1.0.4 h1:sBo2BdShXjmcugAMwjugoGUdUV0pcxY5mW4xKRn3v4c=
 github.com/segmentio/ksuid v1.0.4/go.mod h1:/XUiZBD3kVx5SmUOl55voK5yeAbBNNIed+2O73XgrPE=