ci: test using teh existing action for lfs

.forgejo/workflows/push.yaml

@@ -16,11 +16,8 @@ jobs:
     steps:
       # get the repo first
       - uses: https://code.forgejo.org/actions/checkout@v4
-      - name: "Get LFS objects"
-        uses: https://forgejo.skynet.ie/Skynet/actions-deploy-to-skynet/get_lfs@v3
         with:
-          repository: ${{ gitea.repository }}
-          ref_name: ${{ gitea.ref_name }}
+          lfs: true
       - name: "Build it locally"
         run: nix build --verbose