Update buildkit reference to v0.22.0-rc1

Signed-off-by: CrazyMax <[email protected]>

Author: crazy-max

_vendor/github.com/moby/buildkit/frontend/dockerfile/docs/reference.md

@@ -16,6 +16,6 @@ replace (
 	github.com/docker/cli => github.com/docker/cli v28.1.0-rc.2+incompatible
 	github.com/docker/compose/v2 => github.com/docker/compose/v2 v2.36.0
 	github.com/docker/scout-cli => github.com/docker/scout-cli v1.15.0
-	github.com/moby/buildkit => github.com/moby/buildkit v0.20.0
+	github.com/moby/buildkit => github.com/moby/buildkit v0.22.0-rc1
 	github.com/moby/moby => github.com/moby/moby v28.1.0-rc.2+incompatible
 )

go.mod

@@ -372,6 +372,8 @@ github.com/moby/buildkit v0.19.0 h1:w9G1p7sArvCGNkpWstAqJfRQTXBKukMyMK1bsah1HNo=
 github.com/moby/buildkit v0.19.0/go.mod h1:WiHBFTgWV8eB1AmPxIWsAlKjUACAwm3X/14xOV4VWew=
 github.com/moby/buildkit v0.20.0 h1:aF5RujjQ310Pn6SLL/wQYIrSsPXy0sQ5KvWifwq1h8Y=
 github.com/moby/buildkit v0.20.0/go.mod h1:HYFUIK+iGDRxRgdphZ9Nv0y1Fz7mv0HrU7xZoXx217E=
+github.com/moby/buildkit v0.22.0-rc1 h1:Q47jZZws7+0WhucTcm35NRV8NcO6n1SwIikzfqcGKLo=
+github.com/moby/buildkit v0.22.0-rc1/go.mod h1:j4pP5hxiTWcz7xuTK2cyxQislHl/N2WWHzOy43DlLJw=
 github.com/moby/locker v1.0.1/go.mod h1:S7SDdo5zpBK84bzzVlKr2V0hz+7x9hWbYC/kq7oQppc=
 github.com/moby/moby v24.0.2+incompatible h1:yH+5dRHH1x3XRKzl1THA2aGTy6CHYnkt5N924ADMax8=
 github.com/moby/moby v24.0.2+incompatible/go.mod h1:fDXVQ6+S340veQPv35CzDahGBmHsiclFwfEygB/TWMc=