Bump github.com/coreos/ignition/v2 from 2.14.0 to 2.15.0

Bumps [github.com/coreos/ignition/v2](https://github.com/coreos/ignition) from 2.14.0 to 2.15.0.
- [Release notes](https://github.com/coreos/ignition/releases)
- [Changelog](https://github.com/coreos/ignition/blob/main/docs/release-notes.md)
- [Commits](coreos/ignition@v2.14.0...v2.15.0)

---
updated-dependencies:
- dependency-name: github.com/coreos/ignition/v2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

go.mod

@@ -5,7 +5,7 @@ go 1.18
 require (
 	github.com/coreos/butane v0.17.0
 	github.com/coreos/coreos-cloudinit v1.14.0
-	github.com/coreos/ignition/v2 v2.14.0
+	github.com/coreos/ignition/v2 v2.15.0
 	github.com/coreos/pkg v0.0.0-20220810130054-c7d1c02cb6cf
 	github.com/golang/protobuf v1.5.3
 	github.com/sirupsen/logrus v1.9.0
@@ -17,12 +17,11 @@ require (
 )
 
 require (
-	github.com/aws/aws-sdk-go v1.44.174 // indirect
 	github.com/clarketm/json v1.17.1 // indirect
-	github.com/coreos/go-json v0.0.0-20220810161552-7cce03887f34 // indirect
-	github.com/coreos/go-semver v0.3.1-0.20220328174955-167f5da54033 // indirect
+	github.com/coreos/go-json v0.0.0-20230131223807-18775e0fb4fb // indirect
+	github.com/coreos/go-semver v0.3.1 // indirect
 	github.com/coreos/go-systemd/v22 v22.5.0 // indirect
-	github.com/coreos/vcontext v0.0.0-20220810162454-88bd546c634c // indirect
+	github.com/coreos/vcontext v0.0.0-20230201181013-d72178a18687 // indirect
 	github.com/coreos/yaml v0.0.0-20141224210557-6b16a5714269 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
@@ -32,7 +31,7 @@ require (
 	github.com/vincent-petithory/dataurl v1.0.0 // indirect
 	golang.org/x/sys v0.6.0 // indirect
 	golang.org/x/text v0.8.0 // indirect
-	google.golang.org/genproto v0.0.0-20230110181048-76db0878b65f // indirect
+	google.golang.org/genproto v0.0.0-20230209215440-0dfe4f8abfcc // indirect
 	google.golang.org/protobuf v1.28.1 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )