Bump codecov/codecov-action from 3 to 5 (#234)

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -58,9 +58,10 @@ jobs:
       - name: gcovr
         run: cd build && gcovr -r ..
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v5
         with:
-          gcov: true
+          fail_ci_if_error: true
+          token: ${{ secrets.CODECOV_TOKEN }}
       - name: Generate URSim log files
         if: always()
         run: |