[ci.yml] Codcov upgraded to v4 🆙

Author: shayandavoodii

.github/workflows/ci.yml

@@ -40,6 +40,6 @@ jobs:
      - uses: julia-actions/julia-buildpkg@v1
      - uses: julia-actions/julia-runtest@v1
      - uses: julia-actions/julia-processcoverage@v1
-     - uses: codecov/codecov-action@v3
+     - uses: codecov/codecov-action@v4
        with:
-         file: lcov.info
+         token: ${{ secrets.CODECOV_TOKEN }}