chore: fix validate-tests

Signed-off-by: Dorin Geman <dorin.geman@docker.com>

Author: doringeman

cmd/cli/Dockerfile

@@ -51,4 +51,4 @@ RUN apk add --no-cache make gcc musl-dev
 WORKDIR /src
 RUN --mount=target=. \
   --mount=target=/root/.cache,type=cache \
-  CGO_ENABLED=1 make unit-tests
+  CGO_ENABLED=1 make -C cmd/cli unit-tests

cmd/cli/docker-bake.hcl

@@ -47,7 +47,7 @@ target "update-docs" {
 
 target "validate-tests" {
   inherits = ["_common"]
-  context = "cmd/cli"
+  dockerfile = "cmd/cli/Dockerfile"
   target = "test"
   output = ["type=cacheonly"]
 }