vendor: update buildkit to v0.24.0-rc1

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

go.mod

@@ -29,7 +29,7 @@ require (
 	github.com/hashicorp/hcl/v2 v2.23.0
 	github.com/in-toto/in-toto-golang v0.9.0
 	github.com/mitchellh/hashstructure/v2 v2.0.2
-	github.com/moby/buildkit v0.23.0-rc1.0.20250806140246-955c2b2f7d01 // master
+	github.com/moby/buildkit v0.24.0-rc1
 	github.com/moby/go-archive v0.1.0
 	github.com/moby/sys/atomicwriter v0.1.0
 	github.com/moby/sys/mountinfo v0.7.2
@@ -57,7 +57,7 @@ require (
 	go.opentelemetry.io/otel/trace v1.35.0
 	go.yaml.in/yaml/v3 v3.0.4
 	golang.org/x/mod v0.24.0
-	golang.org/x/sync v0.14.0
+	golang.org/x/sync v0.16.0
 	golang.org/x/sys v0.33.0
 	golang.org/x/term v0.31.0
 	golang.org/x/text v0.24.0
@@ -92,7 +92,7 @@ require (
 	github.com/containerd/errdefs/pkg v0.3.0 // indirect
 	github.com/containerd/ttrpc v1.2.7 // indirect
 	github.com/containerd/typeurl/v2 v2.2.3 // indirect
-	github.com/cpuguy83/go-md2man/v2 v2.0.6 // indirect
+	github.com/cpuguy83/go-md2man/v2 v2.0.7 // indirect
 	github.com/docker/distribution v2.8.3+incompatible // indirect
 	github.com/docker/docker-credential-helpers v0.9.3 // indirect
 	github.com/docker/go-connections v0.5.0 // indirect