build(deps): bump github.com/moby/buildkit from 0.21.0 to 0.21.1

Bumps [github.com/moby/buildkit](https://github.com/moby/buildkit) from 0.21.0 to 0.21.1.
- [Release notes](https://github.com/moby/buildkit/releases)
- [Commits](https://github.com/moby/buildkit/compare/v0.21.0...v0.21.1)

---
updated-dependencies:
- dependency-name: github.com/moby/buildkit
  dependency-version: 0.21.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

go.mod

@@ -28,7 +28,7 @@ require (
 	github.com/mattn/go-shellwords v1.0.12
 	github.com/mitchellh/go-ps v1.0.0
 	github.com/mitchellh/mapstructure v1.5.0
-	github.com/moby/buildkit v0.21.0
+	github.com/moby/buildkit v0.21.1
 	github.com/moby/go-archive v0.1.0
 	github.com/moby/patternmatcher v0.6.0
 	github.com/moby/sys/atomicwriter v0.1.0

go.sum

@@ -318,8 +318,8 @@ github.com/mitchellh/hashstructure/v2 v2.0.2/go.mod h1:MG3aRVU/N29oo/V/IhBX8GR/z
 github.com/mitchellh/mapstructure v0.0.0-20150613213606-2caf8efc9366/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh9fWfEaFds41c1Y=
 github.com/mitchellh/mapstructure v1.5.0 h1:jeMsZIYE/09sWLaz43PL7Gy6RuMjD2eJVyuac5Z2hdY=
 github.com/mitchellh/mapstructure v1.5.0/go.mod h1:bFUtVrKA4DC2yAKiSyO/QUcy7e+RRV2QTWOzhPopBRo=
-github.com/moby/buildkit v0.21.0 h1:+z4vVqgt0spLrOSxi4DLedRbIh2gbNVlZ5q4rsnNp60=
-github.com/moby/buildkit v0.21.0/go.mod h1:mBq0D44uCyz2PdX8T/qym5LBbkBO3GGv0wqgX9ABYYw=
+github.com/moby/buildkit v0.21.1 h1:wTjVLfirh7skZt9piaIlNo8WdiPjza1CDl2EArDV9bA=
+github.com/moby/buildkit v0.21.1/go.mod h1:mBq0D44uCyz2PdX8T/qym5LBbkBO3GGv0wqgX9ABYYw=
 github.com/moby/docker-image-spec v1.3.1 h1:jMKff3w6PgbfSa69GfNg+zN/XLhfXJGnEx3Nl2EsFP0=
 github.com/moby/docker-image-spec v1.3.1/go.mod h1:eKmb5VW8vQEh/BAr2yvVNvuiJuY6UIocYsFu/DxxRpo=
 github.com/moby/go-archive v0.1.0 h1:Kk/5rdW/g+H8NHdJW2gsXyZ7UnzvJNOy6VKJqueWdcQ=