workflows: Prepend reusable workfow with _

.github/workflows/build-host.yml

@@ -1,30 +0,0 @@
-name: Build host
-on:
-  workflow_call:
-    inputs:
-      hosts:
-        required: true
-        type: string
-    secrets:
-      CACHIX_AUTH_TOKEN:
-        required: true
-jobs:
-  build-host:
-    name: ${{ matrix.host }}
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        host: ${{ fromJson(inputs.hosts) }}
-    steps:
-      - uses: actions/checkout@v6
-      - uses: cachix/install-nix-action@v31
-        with:
-          extra_nix_config: experimental-features = nix-command flakes pipe-operators
-      - uses: cachix/cachix-action@v16
-        with:
-          name: sebastian-stork
-          authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
-          useDaemon: false
-      - name: Build host
-        run: nix build .#nixosConfigurations.${{ matrix.host }}.config.system.build.toplevel --print-build-logs