Merge pull request #256 from YichengDWu/dependabot/github_actions/codecov/codecov-action-4

Bump codecov/codecov-action from 3 to 4

Author: YichengDWu

.github/workflows/CI.yml

@@ -34,7 +34,7 @@ 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:
           files: lcov.info
   docs: