New indent-check action added

[marcransome]

🚀 fish-shop/indent-check is the latest addition to the fish-shop family. Use it to check the indentation in your fish shell files:

jobs:
  indent-check:
    runs-on: ubuntu-latest
    steps:
      - name: Check indentation
        uses: fish-shop/indent-check@v1

Everything looks good here 🤓: