Bump codecov/codecov-action from 4 to 5 (#353)

Author: dependabot[bot]

.github/workflows/testing.yml

@@ -72,7 +72,7 @@
            ${{ env.RUN_TEST }}
 
        - name: ${{ matrix.os }}, ${{ matrix.environment-file }}
-         uses: codecov/codecov-action@v4
+         uses: codecov/codecov-action@v5
          with:
            token: ${{ secrets.CODECOV_TOKEN }}
            file: ./coverage.xml