fix arch

Author: antheas

.github/workflows/build_rechunk.yml

@@ -78,10 +78,10 @@ jobs:
           sudo podman manifest create rechunk
           
           SHA=$(sudo skopeo inspect docker://ghcr.io/hhd-dev/rechunk:$VERSION-x86_64 | jq --raw-output ".Digest")
-          sudo podman manifest add rechunk ghcr.io/hhd-dev/rechunk@$SHA --arch linux/amd64
+          sudo podman manifest add rechunk ghcr.io/hhd-dev/rechunk@$SHA --arch amd64
           if [[ ${{ github.event.inputs.x86 }} != "true" ]]; then
             SHA=$(sudo skopeo inspect docker://ghcr.io/hhd-dev/rechunk:$VERSION-aarch64 | jq --raw-output ".Digest")
-            sudo podman manifest add rechunk ghcr.io/hhd-dev/rechunk@$SHA --arch linux/arm64
+            sudo podman manifest add rechunk ghcr.io/hhd-dev/rechunk@$SHA --arch arm64
           fi
 
           sudo podman manifest push --all=false rechunk ghcr.io/hhd-dev/rechunk:latest