wip: use buildkit test image

Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>

Author: crazy-max

.github/workflows/bake.yml

@@ -138,7 +138,7 @@ on:
 
 env:
   BUILDX_VERSION: "v0.30.1"
-  BUILDKIT_IMAGE: "moby/buildkit:v0.26.2"
+  BUILDKIT_IMAGE: "crazymax/buildkit:6397"
   DOCKER_ACTIONS_TOOLKIT_MODULE: "@docker/actions-toolkit@0.71.0"
   COSIGN_VERSION: "v3.0.2"
   LOCAL_EXPORT_DIR: "/tmp/buildx-output"

.github/workflows/build.yml

@@ -145,7 +145,7 @@ on:
 
 env:
   BUILDX_VERSION: "v0.30.1"
-  BUILDKIT_IMAGE: "moby/buildkit:v0.26.2"
+  BUILDKIT_IMAGE: "crazymax/buildkit:6397"
   DOCKER_ACTIONS_TOOLKIT_MODULE: "@docker/actions-toolkit@0.71.0"
   COSIGN_VERSION: "v3.0.2"
   LOCAL_EXPORT_DIR: "/tmp/buildx-output"