ci(codecov): fix input argument following bump to codecov-action v5 (#2765)

Author: PProfizi

.github/workflows/tests.yml

@@ -297,7 +297,7 @@ jobs:
         with:
           token: ${{ secrets.CODECOV_TOKEN }} # required
           report_type: coverage
-          file: ./.tox/.cov/coverage.xml
+          files: ./.tox/.cov/coverage.xml
           name: ${{ env.PACKAGE_NAME }}_${{ matrix.python-version }}_${{ matrix.os }}_pytest_${{ inputs.ANSYS_VERSION || vars.ANSYS_VERSION_DEFAULT }}${{ inputs.test_any == 'true' && '_any' || '' }}.xml
           flags: ${{ inputs.ANSYS_VERSION || vars.ANSYS_VERSION_DEFAULT }},${{ matrix.os }},${{ matrix.python-version }}${{ inputs.test_any == 'true' && ',any' || '' }}