ci: yaml formatting

Author: astratagem

.github/workflows/check.yml

@@ -11,10 +11,12 @@ jobs:
   check:
     runs-on: ubuntu-latest
     steps:
+
     - uses: actions/checkout@v3
       with:
         submodules: true
         fetch-depth: 0
+
     - uses: cachix/install-nix-action@v17
       with:
         extra_nix_config: |