Bump codecov/codecov-action from 5.0.7 to 5.4.0 (#142)

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 5.0.7 to 5.4.0.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](015f24e681...0565863a31)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/ci.yml

@@ -58,7 +58,7 @@ jobs:
 
       - uses: julia-actions/julia-processcoverage@03114f09f119417c3242a9fb6e0b722676aedf38
 
-      - uses: codecov/codecov-action@015f24e6818733317a2da2edd6290ab26238649a # v5.0.7
+      - uses: codecov/codecov-action@0565863a31f2c772f9f0395002a31e3f06189574 # v5.4.0
         with:
           files: lcov.info
           token: ${{ secrets.CODECOV_TOKEN }}