Bump go.step.sm/crypto from 0.15.0 to 0.15.1 (#377)

Bumps [go.step.sm/crypto](https://github.com/smallstep/crypto) from 0.15.0 to 0.15.1.
- [Release notes](https://github.com/smallstep/crypto/releases)
- [Commits](smallstep/crypto@v0.15.0...v0.15.1)

---
updated-dependencies:
- dependency-name: go.step.sm/crypto
  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

@@ -20,7 +20,7 @@ require (
 	github.com/spf13/cobra v1.3.0
 	github.com/spf13/viper v1.10.1
 	github.com/stretchr/testify v1.7.0
-	go.step.sm/crypto v0.15.0
+	go.step.sm/crypto v0.15.1
 	go.uber.org/multierr v1.7.0 // indirect
 	go.uber.org/zap v1.20.0
 	google.golang.org/api v0.66.0

go.sum

@@ -953,8 +953,8 @@ go.opencensus.io v0.22.5/go.mod h1:5pWMHQbX5EPX2/62yrJeAkowc+lfs/XD7Uxpq3pI6kk=
 go.opencensus.io v0.23.0 h1:gqCw0LfLxScz8irSi8exQc7fyQ0fKQU/qnC/X8+V/1M=
 go.opencensus.io v0.23.0/go.mod h1:XItmlyltB5F7CS4xOC1DcqMoFqwtC6OG2xF7mCv7P7E=
 go.opentelemetry.io/proto/otlp v0.7.0/go.mod h1:PqfVotwruBrMGOCsRd/89rSnXhoiJIqeYNgFYFoEGnI=
-go.step.sm/crypto v0.15.0 h1:VioBln+x3+RoejgeBhvxkLGVYdWRy6PFiAaUUN29/E0=
-go.step.sm/crypto v0.15.0/go.mod h1:3G0yQr5lQqfEG0CMYz8apC/qMtjLRQlzflL2AxkcN+g=
+go.step.sm/crypto v0.15.1 h1:N3IT7aZ4PTGcPMV/7wmsWHCO+YG2f2YYEbVSQRerxeQ=
+go.step.sm/crypto v0.15.1/go.mod h1:3G0yQr5lQqfEG0CMYz8apC/qMtjLRQlzflL2AxkcN+g=
 go.uber.org/atomic v1.3.2/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/atomic v1.7.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=