Fix Codecov action parameters in CI workflow (#390)

Fix Codecov action parameters in CI workflow

Author: Chaffelson

.github/workflows/ci.yml

@@ -51,11 +51,10 @@ jobs:
     - name: Upload coverage to Codecov
       uses: codecov/codecov-action@v4
       with:
-        file: ./coverage.xml
+        files: ./coverage.xml
         fail_ci_if_error: false
         verbose: true
-      env:
-        CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+        token: ${{ secrets.CODECOV_TOKEN }}
 
   test-python-311-single-user:
     runs-on: ubuntu-latest