ci: fix audit check attempt 3

Author: Jonas Bostoen

.github/workflows/audit.yml

@@ -39,6 +39,5 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: actions-rs/audit-check@v1
-        working-directory: ${{ matrix.project }}
         with:
           token: ${{ secrets.GITHUB_TOKEN }}