Fix workflow

.github/workflows/main.yml

@@ -30,6 +30,8 @@ jobs:
     runs-on: ubuntu-latest
     name: Check coding style
     continue-on-error: true
+    env:
+      GITHUB_WORKSPACE: ${{ runner.workspace }}
     steps:
       - uses: actions/checkout@v4
       # if this check fails, you have to update the number of auto types known and the list of auto types in the check below
@@ -42,6 +44,7 @@ jobs:
       - name: Show workspace dir
         run: |
           echo "PWD: $(pwd)"
+          echo "GITHUB_WORKSPACE: ${{ github.workspace }}"
           ls -l
           ls -l src || echo "src directory not found"
       - name: Run clang-format