wip: check out repo first

.forgejo/workflows/check.yml

@@ -7,6 +7,8 @@ jobs:
   Check:
     runs-on: ubuntu-latest
     steps:
+      - name: Check out repository code
+        uses: https://code.forgejo.org/actions/checkout@v4
       - name: Install dependencies
         run: |
           sudo apt-get update && sudo apt-get install --yes zstd jq
@@ -36,8 +38,6 @@ jobs:
           purge-key: cache-x86_64-linux-nix-store-
           purge-created: true
           purge-created-max-age: 42
-      - name: Check out repository code
-        uses: https://code.forgejo.org/actions/checkout@v4
       - name: Prepare cachix
         uses: https://github.com/cachix/cachix-action@v12
         with: