CI codecov action: replace deprecated "file" attribute with "files"

Signed-off-by: Nicola Murino <nicola.murino@gmail.com>

.github/workflows/development.yml

@@ -50,7 +50,7 @@ jobs:
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v5
         with:
-          file: ./coverage.txt
+          files: ./coverage.txt
           fail_ci_if_error: false
           token: ${{ secrets.CODECOV_TOKEN }}