chore: cannot have uses and run keys on same id

Author: samrose

.github/workflows/dockerhub-release-matrix.yml

@@ -16,10 +16,10 @@ jobs:
     outputs:
       matrix_config: ${{ steps.set-matrix.outputs.matrix_config }}
     steps:
+      - uses: DeterminateSystems/nix-installer-action@main
       - name: Checkout Repo
         uses: actions/checkout@v3
       - name: Generate build matrix
-        uses: DeterminateSystems/nix-installer-action@main
         id: set-matrix
         run: |
           nix run nixpkgs#nushell -- -c 'let versions = (open ansible/vars.yml | get postgres_major)