Bump codecov/codecov-action from 3 to 5 (#57)

* Bump codecov/codecov-action from 3 to 5

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 3 to 5.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](https://github.com/codecov/codecov-action/compare/v3...v5)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

* Apply suggestions from code review

Co-authored-by: Mosè Giordano <765740+giordano@users.noreply.github.com>

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Dilum Aluthge <dilum@aluthge.com>
Co-authored-by: Mosè Giordano <765740+giordano@users.noreply.github.com>

.github/workflows/ci.yml

@@ -68,9 +68,9 @@ jobs:
 
       - uses: julia-actions/julia-processcoverage@v1
 
-      - uses: codecov/codecov-action@v3
+      - uses: codecov/codecov-action@v5
         with:
-          file: lcov.info
+          files: lcov.info
 
       - name: Verify that test output file exists
         run: test -f "$HOME/julia-buildpkg"