chore: fixing multi-arch build failure (#153)

Signed-off-by: Alex Jones <alexsimonjones@gmail.com>

Makefile

@@ -8,7 +8,7 @@ guard-%:
         exit 1; \
     fi
 docker-build:
-	docker buildx build --build-arg=VERSION="$$(git describe --tags --abbrev=0)" --build-arg=COMMIT="$$(git rev-parse --short HEAD)" --build-arg DATE="$$(date +%FT%TZ)" --platform="linux/ppc64le,linux/s390x,linux/amd64,linux/arm64" -t ${IMG} . --load
+	docker buildx build --build-arg=VERSION="$$(git describe --tags --abbrev=0)" --build-arg=COMMIT="$$(git rev-parse --short HEAD)" --build-arg DATE="$$(date +%FT%TZ)" --platform="linux/ppc64le,linux/s390x,linux/amd64,linux/arm64" -t ${IMG} .
 docker-push:
 	docker buildx build --push --build-arg=VERSION="$$(git describe --tags --abbrev=0)" --build-arg=COMMIT="$$(git rev-parse --short HEAD)" --build-arg DATE="$$(date +%FT%TZ)" --platform="linux/ppc64le,linux/s390x,linux/amd64,linux/arm64" -t ${IMG} .
 build: