ci: fix csharpier command

Author: ChristianSauer

.github/workflows/action.yml

@@ -15,7 +15,7 @@ jobs:
       - uses: actions/checkout@v2
       - run: |
           dotnet tool restore
-          dotnet csharpier --check .
+          dotnet csharpier check .
   test:
     runs-on: ubuntu-latest
     steps: